Assertion: underground river | /r/CapableOf | form in place
Facets:
Source sentences:
text: Underground rivers form in places where there are lots of cracks in the rocks above, so that in rainy weather, the water runs downs and collects in small underground streams.
text: Underground rivers form in places where there are lots of cracks in the rocks above, so that in rainy weather, the water runs downs and collects in small underground streams.