( Vitamins ( ( ( are ( by ( definition compounds ) ) ) ( necessary ( in ( ( trace amounts ) ( for ( ( the ( normal functioning ) ) ( of ( the ( human body ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Vitamins)) (VP (VBP are) (PP (IN by) (NP (NN definition) (NNS compounds))) (ADJP (JJ necessary) (PP (IN in) (S (VP (VBG trace) (NP (NNS amounts)) (PP (IN for) (NP (NP (DT the) (JJ normal) (NN functioning)) (PP (IN of) (NP (DT the) (JJ human) (NN body)))))))))) (. .)))
Vitamins are by definition compounds necessary in trace amounts for the normal functioning of the human body.
(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)))) (. .)))