Ключевые слова: 20s, academic, attention, attentive, book, books, casual, casuals, caucasian, chinese, class, classmates, college, concentration, cooperation, desk, education, female, focused, holding, indian, indoors, information, institute, knowledge, learn, learning, lecture, lecture hall, lesson, line, male, man, mixedrace, pen, row, school, seminar, sitting, students, study, studying, table, university, woman, writing, young adult,