Assertion: coaster's drop | /r/CapableOf | prevent train
Facets:
value: from motion
type: OTHER
value: during a ride evacuation
type: TEMPORAL
Source sentences:
text: Many Bolliger & Mabillard coasters feature an element known as a "pre-drop", a short drop after the top of the lift hill and before the start of the first drop, designed to reduce stress on the lift chain and prevent the trains from motion during a ride evacuation.