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Labyrinthe
A project commissioned by the Canadian Corporation for the
1967 World Exhibition as one of its Theme Pavilions, was conceived and
executed by The National Film Board of Canada. |
Read more at in70mm.com The 70mm Newsletter
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Written by: The National Film Board of Canada. Reprinted from
vintage flyer. Text re-typed
by Anders M Olsson, Sweden. |
Date:
05.03.2023 |
Labyrinthe -
a project commissioned by the Canadian Corporation for the 1967 World
Exhibition as one of its Theme Pavilions, was conceived and executed by The
National Film Board of Canada.
Back in 1964, when the Canadian Corporation for the 1967 World Exhibition
began to round up participation in what was to become EXPO 67, the ground
rules they set were straightforward - "think big and use your imagination."
Participants, private and governmental, took this advice to heart. Some 50
million visitors attested to the fact that EXPO 67 was, without doubt, the
most popular, most imaginative and most highly-acclaimed world exhibition
ever.
At a very early stage, Canada's National Film Board presented a concept
designed to fulfill the C.C.W.E.'s specifications. In fact, so big and so
imaginative was the NFB "Labyrinthe" proposal that potential sponsors
blanched at the project. Fortunately, EXPO itself had faith in the Board's
ability to produce and their faith was well-rewarded. By the time EXPO
closed its gates on October 29, 1967, 1,324,560 people had visited the
pavilion, many of them having waited in lines for up to seven hours for the
privilege.
• Go to "Labyrinthe" gallery
"Labyrinthe" was commissioned as a Theme Pavilion, one of several conceived
to complement EXPO's overall dedication to "Man and his World." While other
theme pavilions represented man's conquest of his environment and his
development as a provider, producer, healer and community-oriented being, "Labyrinthe"
dealt with man's conquest of himself.
The approach used was a contemporary re-telling of the Greek myth in which
the hero Theseus entered a Cretean labyrinth to slay the Minotaur, a monster
half man and half bull whose dietary preferences leaned towards Athenian
citizens.
Director Roman Kroitor explained the symbolism involved as follows: "The
architectural structure is the world and the path followed by the audience
while wending its way through the building is the thread of a person's life.
The theatres are life's experiences and the 'beast' is the inevitably
incomplete realization of one's nature which we hoped would be conquered or
dispelled as one moved through the various phases of 'Labyrinthe."
The presentation was more than an artistic allegory; it was also a proving
ground for various sophisticated cinema techniques. Although it is difficult
to determine whether the concept and symbolism were fully understood by the
audiences, there was virtually unanimous agreement amongst the international
film community that the techniques employed represent the coming thing in
the field of visual communication.
The presentation was the culmination of years of work on the part of
filmmakers, architects, engineers and technicians. "Labyrinthe" is a vast
topic - far too complex to be covered in detail in a publication of this
size. However, this technical bulletin is designed to provide a general
description of the project and the techniques involved. More detailed
information on certain phases is available in the material listed in the
bibliography or from the Technical Operations Branch of the National Film
Board.
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More in 70mm reading:
Gallery "Labyrinthe"
in70mm.com's IMAX Page
The
Birth of IMAX
See the film:
"In
the Labyrinth"
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The Initial Mock-up Stages
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Traditionally, films are made for viewing in conventional movie theatres.
While techniques have changed over the years, these changes have been
evolutionary rather than revolutionary so the most modern motion picture
theatres being built today still strongly reflect the influences of their
generic predecessors - opera houses. Basically, the audience sits in rows in
front of a vertical screen and while attempts have been made to create a
greater degree of audience involvement through the use of wide-screen
projection and stereophonic sound, the effect is two dimensional.
"Labyrinthe" was a departure from this traditional train of thought. The
producers decided at the outset that a multiscreen presentation would best
convey the concept of "Labyrinthe." Since the building itself didn't exist
at the time, architectural considerations did not present restrictions. Once
the revolutionary screening concepts were decided upon, architects were
commissioned to design a building to accommodate the equipment. Before a
single frame of film was shot or any equipment chosen, the "Labyrinthe" team
experimented with various projection and sound systems until they were
satisfied that the techniques chosen would convey the concept with maximum
impact.
This particular phase of the operation - carried out in a rented aircraft
hangar in Ville St-Laurent, Quebec - involved close collaboration between
the production teams, the Technical Operations Branch of the NFB, consulting
engineers and architects.
The multi-screen presentations finally chosen were such that no conventional
theatre could be economically adapted to house the equipment for testing and
the preliminary editing of rushes. Because of the nature of the material
being assembled, it was desirable to work under conditions as close to those
to be found in the actual building as possible. Scale models of several
chambers and anterooms were built in the hangar. Wherever possible,
equipment was tested in these mock-ups before being moved into the actual
chambers.
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The Building
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The task of designing a modern building which still retained the aura of
ancient labyrinths was awarded to the Montreal architectural firm of Bland,
Lemoyne, Shine, who, with the co-operation of consulting engineers N.J.
Pappas & Associates and R.R. Nicolet & Associates, created the designs for
the massive five-storey building which still stands on EXPO's Cité du Havre.
The design of the building dictated the use of a material which would convey
the impression of massiveness, be readily available in quantity, be
reasonably economical and possess good acoustical properties. The final
choice was poured concrete.
Although solid, substantial and equipped with heating and air conditioning
facilities, the building was designed as a "semi-permanent" structure. Since
much of the equipment and display material was installed during the winter
of 1966, heating was incorporated even though this was not an essential
feature in EXPO buildings. However, the architects feel that the heating and
air-conditioning systems would not be adequate for large audiences on a
year-round basis.
The word "labyrinth" is synonymous with confusion; in the original Cretean
structure, the hero had to unwind a ball of twine in order to find his way
out again. While the illusion of mystery and uncertainty was an integral
part of the EXPO re-creation, the architects had to carefully design the
various transition areas to create an illusion of confusion while keeping
audience flow as straightforward as possible.
Passages were designed to handle vast numbers of people in a manner similar
to that used in a "sausage machine". Though various groups of visitors
followed each other through the building very closely, careful placement of
baffles and partitions created a feeling of intimacy. Audience movement
through the various chambers, anterooms and transition areas was carefully
controlled by a master "programmer."
An analysis of the separate operations required in the various areas showed
that each presentation required less than 12 specific operations. The
programmer performed the following functions: dim house lights, start
projectors, start film sound, fade transition music, etc. It also
automatically controlled the audience flow. To avoid congestion, the various
chambers and transition areas were tied together in logical time sequence
and the programmer could "hold" an audience in one area if the subsequent
one was unable to accommodate it immediately.
Initially, the control system was operated manually in part and handled 26
or 27 complete shows per day. Once operating automatically, it handled 30
shows per day without fail.
Because of the number of people being accommodated daily, "Labyrinthe"
strictly adhered to the show business law that the show had to go on
regardless. Minor problems did not result in cancellations. During the six
months that the pavilion was in operation, less than three hours of show
time were lost.
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Chamber I Arrival, Childhood, Confident Youth
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The building contained three main chambers, each relating to one aspect of
"Man the Hero." The visitor entered in a queue which wound its way through a
lobby decorated with the designs of ancient labyrinths and a sculptured
impression of the Minotaur. He then entered a high, cathedral-like court,
"The Great Hall" where special lighting effects and haunting background
music created a mood of mystery and anticipation.
Visitors were then distributed by elevator to one of four levels surrounding
Chamber I and after a brief wait, they were ushered into a theatre unlike
any ever built before.
From eight balconies on four levels on either side of the theatre, the
audience peered down at a huge screen lying horizontally on the floor of the
theatre. Another screen, perpendicular to the floor, rose to a height of 38
feet. Sound was provided by five theatre sound systems located behind the
screens and surround sound came from 288 speakers positioned throughout the
balcony levels.
The 20-minute film presentation recalled the story of man's entry into the
world, his childhood and his confident youth by careful interplay between
the horizontal and vertical screens. In some scenes, the images on the
screen complemented each other; in others, they contrasted.
This technique, of course, presented a number of technical problems. Since
one projector had to operate face down to project on the horizontal screen
and the other on its side to fill the long, narrow vertical screen,
considerable care had to be taken in choosing suitable equipment.
After carefully considering various 70mm machines, NFB engineers chose two
Century JJ-3's fitted with Hughes 5KW Xenon lamp housings and Panavision-Steinheil
95mm lenses. These projectors feature positive lubrication systems capable
of operating in these unusual positions and the 5KW Xenon lamps were found
to offer sufficient light output as well as more simplified operation and
greater operating economy than comparable high-intensity carbon arcs.
Because of the extreme viewing angles encountered in some sections of the
theatres, plain matte white screens were used. The screen mounting presented
an interesting challenge.
A special mounting system was devised incorporating features for rapid
removal and replacement of the screen material. This was necessary since
there was a good possibility that the screens - particularly the horizontal
one - would require frequent cleaning and perhaps replacement. One thing
that was not anticipated was that the horizontal screen would become a
depository for lost articles. During the six months, a variety of items were
removed ranging from false teeth to ladies' handbags.
The Maze
Upon leaving Chamber I, the visitor was assumed to be somewhat confused as
to his role in life. In this frame of mind, he entered the
carefully-contrived "confusion" of "The Maze", an area filled with large
mirror prisms illuminated with thousands of tiny, colored lights which
flashed and twinkled creating an infinite artificial galaxy.
Though the lighting effects in "The Maze" seemed random, they were actually
carefully controlled through programming equipment specially designed by the
NFB.
The intensity of the lights was controlled through 36 narrow band filters
and transistorized DC control amplifiers fed by audio information on the
control track - actually the sixth audio track on the same magnetic film
carrying the five program channels heard in "The Maze." The control system
was so designed that it could operate either from the envelope of an audio
signal or from an artificiallycreated special tone control track.
In the actual presentation, a combination of both control techniques was
utilized.
"The Maze" was designed to symbolize the seemingly endless passages of
ancient labyrinths and the combination of lighting effects and
specially-composed music prepared the visitor for his confrontation with the
symbolic "monster" in Chamber III.
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Chamber III
Conflict, Death/Metamorphosis, Celebration
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The third and final chamber offered the climax of the experience. The
visitor came face-to-face with the monster of his halfrealized self but on
the screen, this inner monster is represented by a crocodile hunted and
killed by Ethiopian tribesmen.
Chamber III featured a multiscreen presentation, a technique very much in
evidence at EXPO 67 and one which presents a variety of technical and
artistic problems. The five-screen cruciform arrangement adopted by the NFB
required meticulous synchronization so all cameras, projectors and editing
equipment could handle five separate films with a minimum of image
imbalance.
Initially, a 70mm single composite print was considered. However, the idea
was rejected for the following reasons: The NFB has excellent facilities for
handling 35mm color material but none for 70mm; the cost of 70mm prints
would have been prohibitive; image quality would have been compromised; and
the theatre design would have necessitated lenses with very short focal
lengths but very large diameters.
The camera system finally adopted consisted of five 35mm Arriflex's mounted
in a cruciform arrangement on a specially designed yoke. Since the five
cameras were to operate simultaneously, interlock and registration
requirements were stringent.
Footage for the Chamber III presentation was shot on location throughout the
world so portability was an important feature. Synchronization between the
cameras was achieved through an NFBdesigned DC interlock with "Syncontrol,"
an electrical system offering accurate synchronization with far less bulk
than mechanical devices.
The interlock system also featured power requirements which could be met in
the field with a reasonable number of portable batteries or, for aerial
work, through standard aircraft power supplies.
When the camera yoke was in use, the center camera was used as a reference
point. Although it would have been preferable to have a single viewfinding
lens cover the entire field of the five camera lenses, this was impractical.
Because of the wide field covered by the rig, however, this was not
considered to be a serious limitation.
Tests and previous experience showed that the closer together the lenses
could be positioned, the more compatible would be the group perspective.
With the Arriflex cameras, however, the film magazines determined the
minimum distance the cameras could be vertically stacked. To keep this
distance as small as possible, it was necessary to use 200-foot magazines
despite the inconvenience of the small film loads and also equip four of the
magazines with special extensions. This permitted a 9½-inch separation
between the lenses.
The five-camera yoke could be operated as a unit or the three horizontal
cameras could be removed and mounted on a separate yoke for shooting footage
destined for the three horizontal screens in the cruciform arrangement. In
addition, the baseplate of each camera was tapped to permit individual
mounting on standard tripods for synchronous shooting of the same subject
from different angles. The interlock system was also designed to permit
separating the cameras for this shooting technique.
From an operational standpoint, the five-camera arrangement worked
remarkably well under harsh field conditions although extreme care had to be
taken in aligning the cameras. Some problems were experienced in operating
the interlock system in low temperatures but a screwdriver adjustment was
incorporated so compensation could be made for any given temperature.
In the cruciform presentation, the five screens alternately showed
panoramic, integrated views on all screens and contrasting or complementing
scenes on each of the screens. Editing the films required an editing rig
arranged in a cruciform also.
NFB technicians met this requirement by interlocking five 35mm D-20 Moviola
heads and three Model SL-20-H Sound Readers and connecting them to a master
control panel. This allowed any or all of the picture or sound heads to
operate in forward or reverse, at variable speeds or at synchronous sound
speed.
In projecting the final print, uniform light distribution and freedom from
picture movement in the various screens were essential. Manufacturers
supplying suitable equipment were contacted and asked how their equipment
would function under these critical conditions. Most reported favorably but
it was obvious that in many cases, they had never before been asked to
provide such all-inclusive information.
Century WMDA 35mm projectors with Hughes 2.5KW Xenon light sources and
Kollmorgan 2-inch and 2¼-inch f1.9 lenses and also featuring Cine-Focus and
water-cooled apertures were chosen. The cooling features permitted
still-framing for periods up to 10 seconds at full light output.
Despite the complexity of the system adopted and the critical adjustments
required to maintain quality, no serious problems were encountered.
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Sound Systems
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The effectiveness of the various "Labyrinthe" presentations depended on
creating a proper "mood." This involved developing special sound effects,
music and sound reproduction equipment. Much of the music used was composed
by NFB Staff Composer Eldon Rathburn; the equipment was designed by the NFB
Sound Division and consulting engineers. These engineers and technicians
faced a number of challenges. They were asked to provide high quality
equipment without sacrificing portability; special pre-mixing and mixing
consoles were required; the programming devices for crowd control also fell
into their jurisdiction.
Multi-channel sound requirements were standardized on six-track 35mm
magnetic film units for the three main chambers and on tape cartridge
equipment for the Entrance, Waiting Room, Transition and Exit areas. The
units feeding Chambers I and III were interlocked to projectors in those
locations; the Chamber II unit also provided audio control information to
operate the Maze lights.
Original material for all sound presentations came from monophonic,
two-track, three-track and four-track stereo masters and all had to be
recorded for reproduction on standard six-channel playback equipment.
For location recording, where portability and high-quality were prime
considerations, NFB technicians found that conventional multi-track
equipment was too bulky for easy transport and that it generally required
external power supplies for driving the capstan and torque motors. Also,
commercially-available professional equipment generally was not suited to
one-man operation.
The solution to this problem consisted of modifying a monophonic
Nagra-Kudelski ¼-inch recorder to two-track stereo operation. Basically, the
modification consisted of mating two Nagra units, utilizing only one
transport mechanism, and using the two electronic packages for each of the
program channels. The regular record and playback heads were replaced by
two-track stereo heads produced to Nagra specifications and mounted with
special headmounts onto the Nagra tapedeck.
Although the original playback speakers could not be mounted into the
adapted recorders because of space limitations, the speakers were enclosed
in separate wooden boxes which could be plugged into the playback circuits
for field playback using the recorder's internal battery power supply.
The adaptation of a Telefunken FM Pilot system utilizing a 10KHz carrier
frequency permitted stereo synchronous recording without the risk of the
60Hz control-track frequency straying into either of the program channels.
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Music recordings were made with a portable 3M four-track one-inch machine
equipped with over-dubb facilities. This unit was used in conjunction with a
custom-made portable mixing console later used in recording sessions with
the Montreal and Toronto symphony orchestras.
The portable console allowed random selection of input channels at either
line or microphone levels as well as a choice of masters and outputs. It
contained two independent sections each featuring six inputs and three
outputs. When both sections were used together, input and output capacity
was doubled. Each channel was equipped with "insert" jacks so equalizers,
filters or reverberation devices could be incorporated as required.
To handle the pre-mixing required before final re-recording, a 19-position
mixing console at the NFB Sound Division was altered to six-track capability
and four existing Westrex 35mm filmtransports were modified with plug-in
head assemblies and printed circuit electronics to handle three- and
six-track recording or reproduction.
Because of the unusual screen configurations and acoustical conditions at
the pavilion, it was decided that the final rerecording could best be
accomplished in the completed chambers of "Labyrinthe" before EXPO opened.
While this required the construction of an elaborate mixing console, it gave
producers, musicians and sound mixers the opportunity of rerecording under
actual auditorium conditions.
This re-recording console was produced by McCurdy Radio Industries, Toronto,
who also delivered the music recording console. Specifications and
acceptance tests were made by the NFB Sound Division and the consulting
system engineer.
The console featured 21 input channels which could select any of 32 program
sources by means of Telefunken crossbar switches activated by thumbwheel
selectors. This was necessary to facilitate the complicated selection of
monophonic, two-, three-, four- and sixtrack program sources and their
distribution to the six-channel release system. For each input channel, a
sensitivity adjustment, straight-line fader, variable equalizer and
push-button output selector were provided. Two custom-made panpots were
incorporated for the distribution of monophonic sound to the six stereo
outputs. Three EMT reverberation units were available.
Seven stereo output channels, each with variable active high-pass and
low-pass filters, and seven 10-watt monitor amplifiers permitted control of
the multi-track outputs. The seventh channel was used as a spare and for
pre-set. For monophonic and multi-track storage applications, three combined
master outputs were also included. The console was equipped with slating,
signal and intercommunication facilities; remote controls of the
reverberation units and an electronic footage counter were incorporated for
use during the re-recording sessions in the pavilion itself.
It was decided to standardize on double system interlock sound operation
using 35mm full-coat magnetic film with one reproducer for each chamber and
two alternates. Five filmtransports were purchased from Westrex, Hollywood,
and equipped with transistorized electronics designed by the Sound Division
in the form of plug-in circuitboards. Three of the filmtransports were used
only as reproducers while the remaining two were also equipped with record
electronics. All transports had custom-made three- and six-track plug-in
head assemblies manufactured by Wolfgang Bogen, Berlin.
These transports provided reproduction and recording facilities for the
re-recording operation and then were used for transferring material from the
completed masters to the presentation sound reels. Finally, they served as
double system sound reproducers during the operation of the pavilion.
Besides this equipment, ¼-inch portable units and a transportable
triple-track 35mm system could be added during the re-recording sessions.
Altec A-4 speaker systems driven by McCurdy 30-watt plug-in amplifiers were
used for sound reproduction in the three main chambers. In Chambers I and
III, five tracks provided behind-screen sound while the sixth provided the
surround sound. In the Maze, five tracks carried the "moving" sound while
the sixth controlled the operation of the prism lights. In addition, over
1,200 8-inch speakers were wired throughout the building to provide surround
sound in the Maze and auxiliary locations.
Sound in the transition and auxiliary areas was provided with a cartridge
tape system so that the presentations could be made in continuous cycles.
Two KRS cartridge systems, each with six ¼-inch tape cartridges were
installed to handle requirements for non-synchronous monophonic and
two-track stereo sound.
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Multi-Screen What is its Future?
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Screen formats present film-makers with a formidable challenge as they
attempt to create presentations with a maximum of audience impact and
involvement. Today, the standard square format is passé. Ideally, the screen
should alter format to suit various image requirements. The noted Russian
cinematographer Eisenstein described this ideal format as a "dynamic
square."
The multi-screen techniques employed in "Labyrinthe" were an attempt to
provide a more flexible format until future technology reaches the stage
where it can provide true flexibility in size, fidelity, ease of
"programming," and composition. Present research into holographs indicates
that the ultimate image used will probably be electronic.
But what does multi-screen offer besides its obvious novelty and surprise?
Writing in the 1967 edition of La Cinémathèque canadienne, "Labyrinthe"
Designer and Co-producer Colin Low suggested that it offers a greater degree
of composition flexibility than conventional screen techniques. It also
allows the showing of the same subject at different time intervals
simultaneously; it can show the same event from different positions or
viewpoints simultaneously. In short, it offers simultaneity.
Poetry often attempts to capitalize on this by assailing its readers with an
amalgam of thoughts, feelings, word pictures and metaphor in rapid
succession. In fact, some poets even abandon conventional literary form in
an attempt to further compress various impressions and thus create a greater
measure of simultaneity. "Labyrinthe" director Roman Kroitor described the
multi-screen concept as being to the single screen what poetry is to prose.
The production of a multi-screen presentation presents several unusual
problems. There are no solid rules that can be laid down. While two
divergent story lines can be effectively tied together by a simple common
denominator (the same predominant color in all images, for example) it is
also very easy to overstimulate the viewer and cause a type of optical
indigestion.
The judicious use of multi-channel sound is also important in multi-screen
work since sound has the effect of preventing confusion between competing
images. But again, care has to be taken that the result retains the nuances
of the individual sound tracks.
Will multi-screen concepts find their way into documentary or educational
films or are they only suited to large EXPO-type presentations with budgets
large enough to permit further experimentation into the medium?
While it's still too early to answer this question definitively, it is very
possible that some of these techniques will become commonplace in the
future. Continuous advancements are being made in the fields of electronics,
optics and film materials and as these developments are perfected, they will
become more economically feasible.
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Production Credits
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FILM EXECUTION
LOCATION RESEARCH: Hugh O'Connor
DIRECTION: Roman Kroitor, Colin Low, Hugh O'Connor
CAMERAMEN: Michel Thomas-d'Hoste, Walter Lassally, Gilles Gascon, Robert
Humble, Georges Dufaux, V.V. Dombrovsky (USSR), Alex O. Krasnov (USSR)
CHIEF CAMERA ASSISTANT: Douglas Bradley
CAMERA ASSISTANTS: Peter Hartmann, Gilles Blais, David Devolpi, Ken Poste
LOCATION MIXER: Edward T. Haley
LOCATION CAMERA TECHNICIAN: John Pley
FILM UNIT MANAGER: David B. Hughes
LOCATION MANAGER: Marcel Malacket
PICTURE EDITING
SUPERVISING EDITOR: Thomas C. Daly
EDITOR (CHAMBER I): Eric Boyd-Perkins ASSISTANT: Patricia Corner
EDITOR (CHAMBER III): Thomas C. Daly ASSISTANT: Yves Dion
SOUND EDITING
CHAMBER I: Jean-Pierre Joutel CHAMBERS II & III: Thomas C. Daly
MUSIC: Eldon Rathburn
ORCHESTRAL CONDUCTOR: Louis Applebaum
COMMENTARY: Donald C. Brittain; Claude Jutra
STUDIO MIXER: Edward T. Haley SECOND MIXER: Michel Descombes
PRINT COLOR BALANCING: Stuart Ferguson
PRODUCTION: Roman Kroitor
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• Go to
"Labyrinthe" for the
1967 World Exhibition |
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28-07-24 |
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