Assertion: roller coaster | /r/CapableOf | use gravity
Facets:
value: as a force
type: MANNER
value: to send a train of cars
type: PURPOSE
Source sentences:
text: A roller coaster is a machine that uses gravity and inertia to send a train of cars along a winding track.
text: But real roller coasters only use gravity as a force to accelerate the coaster.