( ( ( a -RRB- ) ( Comparison ( between ( ( ( reactant and ) product ) ( suggests ( they ( ( differ only ) ( in ( ( the position ) ( of ( ( ( one ( hydrogen ( -LRB- ( ( by ( 5 ( carbon atoms ) ) ) -RRB- ) ) ) ) and ) ( a ( C-C bond ) ) ) ) ) ) ) ) ) ) ) ) ) ; )
(ROOT (NP (NP (LST (LS a) (-RRB- -RRB-)) (NP (NNP Comparison)) (PP (IN between) (NP (NP (NN reactant) (CC and) (NN product)) (SBAR (S (VP (VBZ suggests) (SBAR (S (NP (PRP they)) (VP (VBP differ) (ADVP (RB only)) (PP (IN in) (NP (NP (DT the) (NN position)) (PP (IN of) (NP (NP (CD one) (NN hydrogen) (PRN (-LRB- -LRB-) (PP (IN by) (NP (CD 5) (NN carbon) (NNS atoms))) (-RRB- -RRB-))) (CC and) (NP (DT a) (JJ C-C) (NN bond))))))))))))))) (: ;)))
a) Comparison between reactant and product suggests they differ only in the position of one hydrogen (by 5 carbon atoms) and a C-C bond;
(ROOT (S (NP (NNS Atoms)) (VP (VBP make) (NP (NNS products)) (PP (IN by) (S (VP (VBG rearranging) (NP (PRP$ their) (NN chemical) (NNS bonds)) (PP (IN in) (NP (DT a) (NN reactant))))))) (. .)))