Assertion: toucan's feather | /r/CapableOf | act as a waterproof dressing
Facets:
value: for contour feathers
type: PURPOSE
Source sentences:
text: These granules coat the contour feathers acting as a waterproof dressing for contour feathers, helping to clean the plumage, and give the beak a dusty appearance (O’Malley, 2005).