Assertion: starling's song | /r/HasProperty | different mimicked tones
Facets:
Source sentences:
text: Impressing a Mate : Songs are a large part of bird courtship behavior, and a more varied song that includes different mimicked tones can help attract a better mate.
text: : Songs are a large part of bird courtship behavior, and a more varied song that includes different mimicked tones can help attract a better mate.