Assertion: thorium's isotope | /r/HasProperty | produced
Facets:
value: synthetically
type: MANNER
Source sentences:
text: …in nature is the isotope thorium-232 (several other isotopes exist in trace amounts or can be produced synthetically).
text: Almost all thorium found in nature is the isotope thorium-232 (several other isotopes exist in trace amounts or can be produced synthetically).