Assertion: mercury | /r/AtLocation | nature
Facets:
value: rarely
type: DEGREE
Source sentences:
text: Heavy and silvery-white in appearance, mercury rarely occurs free in nature, and is found mainly in cinnabar ore from Spain and Italy.
text: Mercury rarely occurs free in nature, but can be found in ores, mainly mercury sulfide (cinnabar, HgS).
text: It rarely occurs free in nature and is found mainly in cinnabar ore (HgS) in Spain and Italy.