advice alert appropriate-behavior appropriate-behaviour area assemble assembling Assembly communicating communication direction emergency evacuate evacuation gathering green meeting meeting-place message outdoors outside people place point safety security sign staff white workers appropriate behavior appropriate behaviour get together group meeting place meeting point clean defecate fezes paper poo shit toilet advising behavior behaviour care caution concern danger dangerous inform information informing red abandon abandoned bomb-care empty evacuated grab-pole handle handles interior London poles seat seats subway traffic train transport transportation tube Underground boat buoy captain certified drill drown drowning ferry flashlight float flotation found guaranteed help life lifeboat lifesaver light lost man overboard on board overboard preserve preserver rescue rescued restored ring safe save sea seaworthy ship sink swim vessel water wave waves