Ключевые слова: accident, advice, attention, background, beware, building, careful, caution, clean, cleaner, cleanup, color, danger, exterior, fall, falling, floor, hallway, hazard, icon, information, isolated, janitor, janitorial, lobby, maintenance, message, mop, mopped, nobody, notice, object, outdoors, plastic, precaution, prevention, risk, safety, sign, signal, slide, slip, slippery, symbol, tile, warning, wet, white, yellow,