Assertion: sodium nitrate | /r/HasProperty | mined at tarapacá
Facets:
value: in chile
type: LOCATION
Source sentences:
text: Glossing gunpowder corns with graphite was already an accepted technique in 1839, and sodium nitrate-based blasting powder had been made in Peru for many years using the sodium nitrate mined at Tarapacá (now in Chile).