Assertion: uranium | /r/AtLocation | one or more supernovae
Facets:
value: according to these theories
type: OTHER
Source sentences:
text: The Earth's uranium has been thought to be produced in one or more supernovae over 6 billion years ago.
text: According to these theories, the Earth's uranium was produced in one or more supernovae ("An explosive brightening of a star in which the energy radiated by it increases by a factor of ten billion ...