Assertion: thorium | /r/HasProperty | naturally-occurring element
Facets:
Source sentences:
text: Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium.
text: Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium.
text: Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium.
text: Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium.
text: Thorium is a naturally-occurring element that can be converted (inside a nuclear reactor) into a human-made fissile material called uranium-233.