Ключевые слова: access, alert, area, authorised, background, banned, barred, breach, building, caution, closed, corridor, danger, denied, entry, forbidden, graphic, hall, hand, hazard, indoors, interior, isolated, label, message, no entry, notice, official, only, personnel, place, poster, prohibited, protected, red, restricted, safety, secret, security, sign, staff, symbol, unauthorised, wall, warning, white, worker, zone,