Assertion: polonium | /r/AtLocation | the environment
Facets:
value: naturally
type: MANNER
value: due to radioactive decay of radon
type: CAUSE
value: at very low levels
type: OTHER
Source sentences:
text: Polonium is a radioactive element that occurs naturally in the environment at very low levels or can be produced in a nuclear reactor.
text: Polonium occurs naturally in the environment due to radioactive decay of radon, and we all have traces of polonium in us.
text: Polonium occurs naturally in the environment due to radioactive decay of radon, and we all have traces of polonium in us.