Assertion: parrot's feather | /r/CapableOf | help keep the bird
Facets:
value: from the elements
type: OTHER
value: by trapping air
type: MANNER
Source sentences:
text: These feathers help keep the bird warm by trapping air to provide insulation.
text: Feathers also help to protect the birds from the elements.
text: Not only do feathers help to keep the bird warm, but they also provide water-proofing.