Ключевые слова: advertisement, advertising, background, bilingual, billboard, black, blackboard, blank, board, buddhist, chalk, chalkboard, chinese, class, communication, concept, drawing, education, english, grunge, information, knowledge, learning, message, note, old, religion, religious, reminder, school, scratch, space, studying, symbol, teach, text, texture, used, white, wood, wooden, write, zen,