Ключевые слова: adult, auditorium, caucasian, cinema room, college, conference, conference hall, copy space, crowd, education, female, gesturing, girl, hall, high school, horizontal, indoors, lecture, lecture hall, lesson, lighting equipment, low lighting, meeting room, meetings, microphone, podium, presentation, public talk, reading, school, speaker, speech, spotlight, student, students, talking, teaching, theatre,