Assertion: cavern | /r/HasProperty | developed as show caves
Facets:
value: in 2012
type: TEMPORAL
Source sentences:
text: Located in Corydon, Indiana, the caverns are part of the Binkley Cave System, and were first developed as show caves in 2012; that same year, researchers found that Blowing Hole Cave and Binkley Cave weren’t connected via a passageway, they were together one long cave.