Assertion: actinium | /r/HasProperty | expensive
Facets:
Source sentences:
text: Actinium is very rare and expensive; it has not common uses.
text: But actinium is rare, expensive and radioactive; perhaps I consider that actinium is good for science.
text: Actinium is very rare and expensive; it has not common uses.
text: Actinium is very rare and expensive; it has not common uses.