Assertion: cobalt | /r/ObjectUse | used in alloy
Facets:
value: often
type: TEMPORAL
value: for magnets
type: PURPOSE
Source sentences:
text: Cobalt is one of the three ferromagnetic metals, so it is often used in alloys for magnets.
text: Cobalt is used in alloys, semiconductors, fertiliser, as a drying agent for varnish and enamel coating for steel.