Assertion: uranium's radioactivity | /r/HasProperty | left in all the polonium
Facets:
value: behind
type: LOCATION
Source sentences:
text: That's why Marie Curie found most of the radioactivity left behind in the residues, including all the radium and all the polonium.
text: That's why Marie Curie found most of the radioactivity left behind in the residues, including all the radium and all the polonium.