Ключевые слова: 70s, adult, background, book, casual, chair, cheerful, class, course, education, elderly, expression, female, graduation, graduation hat, happy, hat, isolated, joy, joyful, knowledge, learn, learning, lecture, lesson, lifestyle, literature, looking, male, man, mature, mortarboard, notebook, notepad, old, pen, pensioner, people, retired, school, school chair, senior, sitting, smile, smiling, student, study, two, white, woman,