Assertion: beaver's tail | /r/ObjectUse | used as rudder
Facets:
value: in the water
type: LOCATION
value: in swimming
type: TEMPORAL
Source sentences:
text: The tail is used as a rudder in swimming, as a balance prop while working on land and to signal danger when slapped on the water.
text: River otters are long-bodied, well-muscled animals, with relatively short legs, five webbed toes on all four feet, (most carnivores have 4 toes on the rear foot), and a long flat tail used as a rudder in the water.