These air sacs allow the bird to get more oxygen from each breath, and also make their bodies lighter for flying.
(These air sacs; also make; their bodies lighter for flying) (These air sacs; allow; the bird to get more oxygen from each breath) Context(These air sacs allow,List([0, 20))):(the bird; to get; more oxygen; from each breath)
These air sacs allow,List([0, 20))
These air sacs These air sacs the bird
also make allow to get
their bodies lighter for flying
the bird to get more oxygen from each breath
more oxygen from each breath