Assertion: beryllium | /r/HasProperty | occurring element
Facets:
value: naturally
type: MANNER
Source sentences:
text: Beryllium is a naturally occurring element found in rock and soil in the form of beryl and bertrandite, respectively.
text: Although beryllium is a naturally occurring substance, the major source of its emission into the environment is the combustion of fossil fuels (primarily coal), which releases beryllium-containing particulates and fly ash into the atmosphere.