Assertion: cave's feature | /r/HasProperty | sinkhole
Facets:
Source sentences:
text: In addition to the numerous caves that are located within the park, other geologic features of interest include sinkholes, limestone bluffs and springs.
text: Distinctive features of karst terrain include sinkholes, which are circular depressions where the underlying rock has been dissolved away, irregular topography, natural bridges, and so-called sinking streams that abruptly disappear beneath the surface.