Ключевые слова: abstract, alarm, alert, ambulance, background, beacon, black, building, bulb, business, danger, door, doorway, emergency, equipment, escape, evacuation, exit, factory, fire, japan, lamp, light, lighting, office, panel, police, red, rescue, safety, security, sign, siren, sound, speaker, staircase, stairs, stairwell, subway, train, train station, wall, warning, way, white,