Assertion: actinium | /r/AtLocation | nature
Facets:
value: to any significant extent
type: OTHER
Source sentences:
text: Actinium, thorium, protactinium, and uranium are the only actinoid elements found in nature to any significant extent.
text: Actinium is found in trace quantities in nature.
text: Actinium is found in trace quantities in nature.
text: Actinium is found in trace quantities in nature.
text: Actinium is found in trace quantities in nature.