education, education building, educator, educators, enjoyment, eye contact, eyeglasses, fifty, focus on foreground, foreground, front view, front views, half-length, higher education, human, human being, humans, incidental people, indoor, indoors, inside, instruct, instructed, instructing, instruction, instructions, instructs, joy, joyful, joyous, knowledge, learn, learned, learning, learns, learnt, looking at camera, man, mature adult, mature men, men, mid life, middle age, middle aged, middle-age, middle-aged, occupation, occupations, one, one person, people, person, photographic, photography, pleasure, portrait, portraits, portraiture, positive emotion, positive emotions, professional occupation, professor, professors, school, school building, school buildings, schools, smile, smiles, smiling, standing, stood, teacher, toothy smile, tuitions, tutoring, universities, university, vertical, vertically, verticals, waist up, waist-up, europe, gothenburg, graduate profession, professional occupations, scandinavia, sweden