( ( American ( Birding Association ) ) ( ( 's ( Winging It ) ) . ) )
(ROOT (S (NP (NNP American) (NNP Birding) (NNP Association)) (VP (VBZ 's) (VP (VBG Winging) (NP (PRP It)))) (. .)))
American Birding Association's Winging It.
(ROOT (S (NP (NP (DT The) (NN bird) (NN ancestor)) (SBAR (WHNP (WDT that)) (S (VP (VBD lived) (PP (IN in) (NP (NNS trees))))))) (VP (VBD developed) (NP (NP (NNS wings)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (ADVP (RB commonly)) (VP (VBN associated) (PP (IN with) (NP (NNS birds))))))))) (. .)))
The bird ancestor that lived in trees developed wings, which is commonly associated with birds.