Assertion: bronze's copper | /r/HasProperty | 90%
Facets:
Source sentences:
text: Commercial bronze: Copper (90%), Zinc (10%)
text: Bronze is usually made up of copper (about 90%) and tin (about 10%)
text: I know it consists of copper (90%) and tin (10%) which should be 9 parts in 10 copper.
text: Bronze is an alloy of copper ( 90% ) and tin ( 10% ).