Assertion: tungsten | /r/AtLocation | mineral
Facets:
value: as the pure metal
type: MANNER
value: naturally
type: MANNER
Source sentences:
text: It occurs in rocks and minerals combined with other chemicals, but never as a pure metal.
text: Tungsten occurs naturally in the environment, in minerals, but not as the pure metal.
text: It occurs in rocks and minerals combined with other chemicals, but never as a pure metal.