Assertion: seahorse | /r/CapableOf | beat their dorsal fins
Facets:
value: to propel themselves
type: PURPOSE
Source sentences:
text: Seahorses beat their dorsal fins back and forth to propel themselves through the water in an upright position.
text: Seahorses are built for maneuvering, not speed -- though they beat their dorsal fins almost 35 times per second.