Assertion: opal | /r/HasProperty | mined at listowel downs
Facets:
value: at white cliffs in nsw
type: LOCATION
value: commercially
type: MANNER
value: in 1875
type: TEMPORAL
value: in queensland
type: LOCATION
Source sentences:
text: Opal was first mined commercially at Listowel Downs in Queensland in 1875 and later at White Cliffs in NSW.