Assertion: cobalt | /r/AtLocation | nature
Facets:
value: in compounds
type: LOCATION
Source sentences:
text: Cobalt is a mineral found in nature, generally in the crust of the earth and used in a variety of industries.
text: Cobalt is only found in nature in compounds.
text: Cobalt is a nonradioactive metal found in nature from which radioactive isotopes can be produced by linear accelerators (for medical and commercial uses) and nuclear reactors (as a waste by-product).
text: Cobalt has yet to be found in nature, but is being grown in labratories and these cobalt specimens are starting to appear in rock shops.