Assertion: roller coaster's car | /r/CapableOf | ride 18 miles
Facets:
value: alone
type: MANNER
value: by gravity
type: CAUSE
Source sentences:
text: The loaded cars and a separate car for the mules rode 18 miles (29 kilometers) downhill by gravity alone.
text: The loaded cars and a separate car for the mules rode 18 miles (29 kilometers) downhill by gravity alone.