Keywords
20-25 years, adult, boredom, casual clothing, class, concentration, day, education, group of people, indoors, leaning, lecture theatre, lesson, man, mixed race, overworked, sitting, sleeping, student, textbook, tiredness, university student, woman, young adult, young man, young woman, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, u12571576