( ( The body ) ( ( ( needs zinc ) ( to ( ( use ( vitamin A ) ) properly ) ) ) . ) )
(ROOT (S (NP (DT The) (NN body)) (VP (VBZ needs) (NP (NN zinc)) (S (VP (TO to) (VP (VB use) (NP (NNP vitamin) (NNP A)) (ADVP (RB properly)))))) (. .)))
The body needs zinc to use vitamin A properly.
(ROOT (S (S (NP (NNS Vitamins)) (VP (VBP are) (NP (NP (DT the) (JJ organic) (NNS compounds)) (SBAR (IN that) (S (NP (DT the) (NN body)) (VP (VBZ needs) (PP (IN in) (NP (JJ small) (NNS amounts))) (S (VP (TO to) (VP (VB function) (ADVP (RB properly))))))))))) (: ;) (S (NP (NNS humans)) (VP (VBP need) (NP (CD 13) (JJ different) (NNS ones)))) (. .)))