Ключевые слова: amphitheater, arena, audience, auditorium, background, baseball, bench, blank, chair, chairs, competition, concert, covid19, empty, empty stands, event, fan, fans, field, football, game, grandstand, group, horizontal, insulation, line, lockdown, nobody, number, objects, pattern, place, plastic, presentation, public, quarantine, row, seat, seating, section, sit, sitting, soccer, spectator, sport, stadium, stage, tribune, uninhabited, yellow,