Assertion: cerium | /r/HasProperty | artificiallythat
Facets:
Source sentences:
text: Cerium has to be artificiallythat is not commonly found in nature.
text: Cerium has to be artificiallythat is not commonly found in nature.
text: Cerium has to be artificiallythat is not commonly found in nature.
text: Cerium has to be artificiallythat is not commonly found in nature.