Ключевые слова: accident, attention, background, beware, board, bucket, building, business, careful, caution, clean, cleaner, cleaning, cleanup, commercial, copy, danger, domestic, fall, floor, hazard, indoor, information, interior, janitor, lobby, maintenance, mop, nobody, notice, person, phrase, plastic, precaution, prevention, risk, safety, safety sign, service, sign, signal, slide, slip, slippery, stair, symbol, warning, wet, wet floor, yellow,