Assertion: solitaire's wing | /r/CapableOf | create low-frequency sounds
Facets:
value: for communicating with mates
type: PURPOSE
Source sentences:
text: The wings could create low-frequency sounds for communicating with mates, or to warn rivals, but it is unknown exactly how this sound was created.
text: The wings could create low-frequency sounds for communicating with mates, or to warn rivals, but it is unknown exactly how this sound was created.