Assertion: emu's feather | /r/CapableOf | help the bird
Facets:
value: to control their flight
type: PURPOSE
value: from the elements
type: OTHER
Source sentences:
text: Wing feathers – these feathers help the bird to fly by giving it life through the air currents.
text: Feathers also help to protect the birds from the elements.
text: Tail feathers – these feathers help the bird to control their flight and to change direction.