Ключевые слова: amphitheater, architecture, audience, auditorium, black, blur, blurred, business, campus, chair, class, classroom, college, conference, curve, education, empty, furniture, group, hall, indoors, interior, learn, lecture, meeting, modern, nobody, red, room, row, school, seat, seating, seminar, slope, stairs, student, study, table, teach, teachen, theater, university, white,