Ключевые слова: aisle, amphitheater, arena, ascending, athletics, baseball, bleacher, blue, bottom, chair, competition, concert, descending, empty, event, exit, fans, field, football, game, grandstand, grass, leisure, line, nobody, numbered, numbers, outdoor, plastic, public, row, seat, seating, sit, soccer, spectator, sports, stadium, staircase, stairs, stairway, stairwell, stands, steep, symmetry, tennis, top, up, vacant, win,