Assertion: bronze's copper | /r/HasProperty | mined
Facets:
Source sentences:
text: This network imported tin and charcoal to Cyprus, where copper was mined and alloyed with the tin to produce bronze.
text: This network imported tin and charcoal to Cyprus, where copper was mined and alloyed with the tin to produce bronze.
text: Most copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper.
text: aes being the generic Latin term for copper alloys and Cyprium from Cyprus, where much copper was mined.