Assertion: coyote's howl | /r/CapableOf | serve the purpose
Facets:
value: including calling the family
type: PURPOSE
Source sentences:
text: The lone howl is the most iconic sound of the coyote, and may serve the purpose of announcing the presence of a lone individual separated from its pack.
text: A coyote's howl serves several purposes including calling the family back together and letting other coyotes know "this" territory is taken.