( ( Long bones ) ( ( ( ( function chiefly ) ( as ( ( levers and ) aid ) ) ) ( in ( support ( , ( ( locomotion and ) prehension ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Long) (NNS bones)) (VP (VBP function) (ADVP (RB chiefly)) (PP (IN as) (NP (NNS levers) (CC and) (NN aid))) (PP (IN in) (NP (NN support) (, ,) (NN locomotion) (CC and) (NN prehension)))) (. .)))
Long bones function chiefly as levers and aid in support, locomotion and prehension.
(ROOT (S (NP (DT The) (JJ long) (NN bone)) (VP (VBP work) (PP (IN as) (NP (NN lever)))) (. .)))