Assertion: tundra swan | /r/CapableOf | begin a long glide
Facets:
Source sentences:
text: Zoologist D.G. Elliot reported in 1898 that a tundra swan he had shot and wounded in flight began a long glide down whilst issuing a series of "plaintive and musical" notes that "sounded at times like the soft running of the notes of an octave".