Ключевые слова: arena, array, audience, background, bench, blank, bottom, chair, championship, cinema, circus, collapsible, competition, concert, conference, empty, euro, event, folding, football, free, game, hockey, letzigrund, multiple, number, openair, pattern, pew, place, plastic, presentation, public, ready, red, row, seat, section, sitting, soccer, sport, stadium, stand, texture, theater, tribune, worldcup, zurich,