Assertion: tower | /r/HasProperty | emptied
Facets:
value: simultaneously
type: MANNER
Source sentences:
text: The total evacuation triggered by a bomb hoax on 12 September 2001 (the day after the September 11 attacks destroyed the twin towers of the World Trade Center in New York City) showed that the bridge would not be useful if both towers need to be emptied simultaneously, as the capacity of the staircases was insufficient for such an event.