Assertion: mercury's core | /r/HasProperty | large
Facets:
value: very
type: DEGREE
value: in iron
type: OTHER
Source sentences:
text: Therefore, for it to have such a high density, its core must be large and rich in iron.
text: Geologists estimate that its core is very large, and mostly iron.
text: These facts have allowed NASA scientists and others to surmise that its core must be large and contain overwhelming amounts of iron.