Ключевые слова: accident, alarm, alert, alertness, ambulance, appliance, attack, attention, background, beacon, bulb, careful, caution, city, condition, control, danger, dangerous, emergency, equipment, fire, fire alarm, flash, flasher, flashing, hazard, lamp, lantern, light, lighting, medical, police, red, red warning, rescue, safety, security, sign, signal, siren, technology, urban, urgency, urgent, warn, warning, warning lamp, warning light,