Assertion: alloy | /r/HasProperty | useful
Facets:
value: often
type: TEMPORAL
value: for coinage
type: PURPOSE
Source sentences:
text: This alloy was very hard and useful for coinage.
text: An alloy is distinct from an impure metal in that, with an alloy, the added elements are well controlled to produce desirable properties, while impure metals such as wrought iron are less controlled, but are often considered useful.