Assertion: contour feather | /r/CapableOf | serve as insulation
Facets:
Source sentences:
text: - feathers that line the bird's body and provide streamlining, insulation, and waterproofing down - fluffy feathers located under the contour feathers that serve as insulation
text: - fluffy feathers located under the contour feathers that serve as insulation semiplume - feathers located under the contour feathers that serve as insulation (slightly larger than down feathers)
text: - feathers located under the contour feathers that serve as insulation (slightly larger than down feathers)