Assertion: polonium's isotope | /r/AtLocation | nuclear reactor
Facets:
value: due to its scarcity
type: CAUSE
value: artificially
type: MANNER
value: usually
type: TEMPORAL
Source sentences:
text: Due to its scarcity, the most common isotope, polonium-210, is usually produced artificially in a nuclear reactor.
text: The source of the polonium 210, a rare isotope produced by nuclear reactors, has not been identified.
text: Due to its scarcity, the most common isotope, polonium-210, is usually produced artificially in a nuclear reactor.