Assertion: cave | /r/HasProperty | natural cavern
Facets:
value: in rock
type: LOCATION
value: in the earth
type: LOCATION
value: in the ground
type: LOCATION
Source sentences:
text: Thor's Cave (also known as Thor's House Cavern and Thyrsis's Cave) is a natural cavern located at in the Manifold Valley of the White Peak in Staffordshire, England.
text: A cave is a natural opening in the ground extending beyond the zone of light and large enough to permit the entry of man.
text: Caves are natural openings in the Earth that are large enough to allow a person to enter and extend beyond the zone of light penetration.
text: Simply defined, a cave is a natural underground opening or cavity in rock that is large enough for a person to enter; however, the term cave has many definitions.
text: Caves are natural underground tunnels that may widen in places to form caverns.