Assertion: humpback whale's tail | /r/CapableOf | serve as both a rudder
Facets:
value: in the air
type: LOCATION
Source sentences:
text: The tail of the otter serves as both a rudder and a weapon.
text: The tail is not prehensile, but acts as a rudder in the air, and like a tripod at rest, allowing the tarsier to sit comfortably on vertical branches.
text: The tail of the otter serves as both a rudder and a weapon.