Assertion: dolphin's speed | /r/CapableOf | exceed 20 miles
Facets:
value: to swim quick circles
type: PURPOSE
value: an hour
type: TEMPORAL
Source sentences:
text: In the shallow waters of Florida Bay dolphins use their speed, which can exceed 20 miles an hour, to swim quick circles around schools of mullet fish, stirring up curtains of mud that force the fish to leap out of the water into the dolphins’ waiting mouths.