Ключевые слова: advertisement, advertising, background, billboard, black, blackboard, blank, board, chalk, chalkboard, class, classroom, close, closeup, color, communication, concept, copy, copyspace, dirty, drawing, eat, education, empty, food, frame, handwriting, information, lesson, menu kitchen, message, note, old, school, sign, symbol, teacher, text, texture, white, wood, write,