Assertion: humpback whale's song | /r/HasProperty | produced
Facets:
value: most likely
type: DEGREE
value: by circulating air
type: OTHER
Source sentences:
text: Humpbacks don’t have vocal chords; their songs are most likely produced by circulating air through the tubes and chambers of their respiratory system.
text: The songs, complex combinations of moans, howls, and cries that can continue for hours, are produced when whales push air around in their heads, then amplify the sounds through a blob of fat that perches on the top jaw.