Ключевые слова: abstract, advertisement, advertising, art, backdrop, background, billboard, black, blackboard, blank, board, chalk, chalkboard, class, classroom, close, closeup, communication, copy, dark, design, dirty, drawing, education, empty, frame, gray, grey, grunge, grungy, horizontal, learning, light, message, old, pattern, photo, retro, rough, school, space, surface, texture, textured, vintage, wall, wallpaper, white, wood, write,