Assertion: harbor seal | /r/CapableOf | move their hind flippers
Facets:
value: to propel themselves
type: PURPOSE
value: from side
type: MANNER
Source sentences:
text: Harbor seals swim with all four flippers: they move their hind flippers from side to side to propel themselves forward, and use their foreflippers to help them steer.
text: Harbor seals move their hind flippers side-to-side to propel themselves in water.