Ключевые слова: adult, attention, audience, auditorium, business, business meeting, businesspeople, casual, chair, colleagues, communication, conference, convention, corporate event, delegates, discussion, display, education, event, group of people, hall, head, journalism, learning, lecture, lecturer, listening, meeting, news, news conference, participants, people, podium, presentation, press conference, public, public event, public meeting, public speaker, rear, roll up, row, screen, seating, seminar, table, team, training, unrecognizable person, watching,