Ключевые слова: academic, adult, african, afro, attending, attention, audience, briefing, business, camera, caucasian, class, classmate, classroom, coaching, college, conference, course, desk, diverse, education, event, faculty, group, institute, instructor, lecture, lesson, listen, manager, media, meeting, multiethnic, participants, people, professional, public, row, seminar, session, sitting, smiling, student, study, studying, talk, training, tutorial, university, workshop,