Assertion: radon | /r/CapableOf | occur across the u.s
Facets:
value: at varying concentrations
type: LOCATION
value: naturally
type: MANNER
Source sentences:
text: Radon is an odorless, colorless, chemically inert but radioactive gas that occurs naturally all across the U.S at varying concentrations.
text: Radon is an odorless, colorless, chemically inert but radioactive gas that occurs naturally all across the U.S at varying concentrations.