Assertion: swallow's nest | /r/HasProperty | enormous limestone caves
Facets:
value: principally
type: LOCATION
Source sentences:
text: The nests were formerly harvested from caves, principally the enormous limestone caves at Gomantong and Niah in Borneo.
text: The nests were formerly harvested from caves, principally the enormous limestone caves at Gomantong and Niah in Borneo.