( ( Human beings ) ( ( ( do not ) ( have ( ( the ( necessary enzymes ) ) ( to ( ( ( break down ) cellulose ) ( to glucose ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Human) (NNS beings)) (VP (VBP do) (RB not) (VP (VB have) (S (NP (DT the) (JJ necessary) (NNS enzymes)) (VP (TO to) (VP (VB break) (PRT (RP down)) (NP (NN cellulose)) (PP (TO to) (NP (NN glucose)))))))) (. .)))
Human beings do not have the necessary enzymes to break down cellulose to glucose.
(ROOT (S (NP (NNP Cellulose)) (VP (VBZ is) (VP (VBN created) (PP (IN by) (NP (NP (DT the) (NN polymerization)) (PP (IN of) (NP (NN glucose))))))) (. .)))