Assertion: hummingbird's wing | /r/CapableOf | flap audible
Facets:
value: to humans
type: TRANSITIVE-OBJECT
value: at high frequencies
type: TEMPORAL
Source sentences:
text: They are known as hummingbirds because of the humming sound created by their beating wings, which flap at high frequencies audible to humans.
text: They are known as hummingbirds because of the humming sound created by their beating wings which flap at high frequencies audible to humans.