Ключевые слова: access, alert, allowed, area, attention, background, barrier, board, business, caution, control, danger, dangerous, denied, design, do, enter, entrance, entry, fence, forbidden, hazard, information, label, message, metal, no, not, object, outdoors, pass, permission, permit, precaution, prohibited, prohibition, protection, red, restricted, restriction, risk, safety, security, sign, stop, symbol, text, warning, white, zone,