Ключевые слова: arrangement, audience, auditorium, background, black, business, ceremony, chair, chairs, concept, concert, conference, congress, convention, empty, empty seats, equipment, event, folding, folding chair, furniture, group, horizontal, indoors, lawn chair, lecture, line, many, material, meeting, modern, nobody, object, organization, outdoor, pattern, perspective, plastic, presentation, row, rows, rows of seats, seat, seating, seats, seminar, sitting, speech, teamwork, theater,