Ключевые слова: 20s, african, afro, american, black, book, campus, casual, caucasian, clothing, college, computer, discussion, education, ethnic, helping, indoors, internet, laptop, learning, library, male, meeting, men, mixed, people, person, portrait, race, researching, sitting, social, student, study, studying, talking, teacher, teaching, teenager, together, tutor, two, university, working, young,