Assertion: mountain gorilla's hair | /r/AtLocation | their backs
Facets:
Source sentences:
text: Silverbacks get their name from the silver hair that grows on their backs as they mature.
text: Habitat: Mountain gorillas live in close-knit family groups that may have up to 30 members and the group consists of a dominant male called a silver-back because of the grey hair which grow around its back
text: Adult male gorillas are called "silverbacks" for the silver hair that grows on their backs