Assertion: fluorine | /r/HasProperty | rare
Facets:
value: in the universe
type: LOCATION
value: at only 400 parts per billion
type: OTHER
value: relatively
type: DEGREE
Source sentences:
text: Fluorine is relatively rare in the universe compared to other elements of nearby atomic weight.
text: Fluorine seems to be a rather rare element in the universe, but it isn’t very rare here at home.
text: Fluorine is so rare because it is not a product of the usual nuclear fusion processes in stars.
text: Fluorine is rare in the universe, at only 400 parts per billion.