Ключевые слова: background, black, blackboard, blank, board, chalk, chalkboard, comment, comments, concept, conceptual, content, copy, copyspace, definition, description, detail, dirty, document, drawing, education, explanation, grunge, handwriting, information, list, message, nobody, old, page, sign, space, symbol, text, textbook, texture, title, web, website, white, wooden, word, write, writing,