( ( A movement ) ( ( ( needs ( all ( its wings ) ) ) ( to ( stay aloft ) ) ) . ) )
(ROOT (S (NP (DT A) (NN movement)) (VP (VBZ needs) (NP (PDT all) (PRP$ its) (NNS wings)) (S (VP (TO to) (VP (VB stay) (ADVP (RB aloft)))))) (. .)))
A movement needs all its wings to stay aloft.
(ROOT (S (NP (NNP Birds)) (VP (VBP need) (NP (DT a) (JJ light-weight) (NN body)) (PP (IN for)) (S (VP (TO to) (VP (VB stay) (ADVP (RB aloft)))))) (. .)))