Assertion: turkey's beard | /r/MadeOf | modified feathers
Facets:
Source sentences:
text: The males usually grow a “beard” made of modified feathers that pop out of the breast, which extends to approximately 9 inches.
text: They develop 9 inches long beard composed of modified feathers that grow from the chest.
text: The males typically have a "beard" made of modified feathers sticking out from the middle of their breast.