Ключевые слова: abstract, ad, advertisement, advertising, announcement, background, billboard, black, blackboard, blank, board, bulletin, canvas, chalk, chalkboard, class, classroom, close, closeup, communication, copy, design, distressed, education, element, empty, frame, grunge, grungy, horizontal, learning, macro, message, nobody, notice, noticeboard, photo, photograph, rubbed, school, smudged, space, surface, texture, textured, wall, white,