Assertion: iron | /r/HasProperty | heavy
Facets:
value: according to jpl
type: OTHER
Source sentences:
text: Because the iron is heavy and hot when it is turned on, the little strings stretch and go flat when the iron is put on top.
text: Many think iron is a heavy metal, which it is not.
text: Iron is the heaviest element formed in the cores of stars, according to JPL.
text: Iron has little use in aerospace vehicles because it is heavy and corrodes readily.