Assertion: cobalt | /r/RelatedTo | nickel
Facets:
value: frequently
type: TEMPORAL
value: in nature
type: LOCATION
Source sentences:
text: In nature, cobalt is frequently associated with nickel.
text: Cobalt occurs in the minerals cobaltite, smaltite, and erythrite, and is often associated with nickel , silver , lead , copper , and iron ores, from which it is most frequently obtained as a by-product.
text: Frequently, cobalt is associated with nickel because both elements have characteristic ingredients of meteoric iron.