Assertion: boron | /r/CreatedBy | supernova
Facets:
value: entirely
type: DEGREE
Source sentences:
text: Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in the Solar System and in the Earth's crust.
text: Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in the Solar system and in the Earth's crust.