Assertion: cave | /r/CapableOf | extend more than 12 feet
Facets:
value: into the rock
type: TRANSITIVE-OBJECT
Source sentences:
text: I have walked the perimeter of all of the major buttes in western North Dakota (Sentinel Butte, Square, Black, White, Chalky, East and West Rainy, etc.) and have come across only one cave that extended more than 12 feet into the rock.