Assertion: impurity | /r/HasProperty | common
Facets:
value: always
type: DEGREE
value: to process newly extracted metal
type: PURPOSE
Source sentences:
text: Logically, removing the impurities from metal (smelting) and actually making it into something do not have to be done at the same time, and it has always been common to process newly extracted metal into blob-shaped or bar-shaped ingots, convenient for storage or shipping.