Assertion: gorilla's silverback | /r/HasAspect | grey hair
Facets:
value: on its back
type: LOCATION
Source sentences:
text: The Silverback has grey hair on its back which develops with sexual maturity at the age of 11.
text: The dominant silverback has more than a few grey hairs to worry about: he makes decisions on behalf of the group, determines movement, mediates conflict, protects young gorillas from infanticide and defends against predators.