Ключевые слова: 20s, academic, adult, african, american, casual, caucasian, classmates, classroom, college, community, confidence, content, descent, diverse, education, ethnicity, expression, female, friendship, front, gesture, group, hispanic, horizontal, indoors, knowledge, large, man, meeting, mixed, multi, multi ethnic, occupation, people, portrait, posing, positive, race, relaxed, satisfied, senior, showing, smart, smiling, student, success, team, woman, young,