( ( ( double bonds ) ( in ( one molecule ) ) ) ; )
(ROOT (NP (NP (JJ double) (NNS bonds)) (PP (IN in) (NP (CD one) (NN molecule))) (: ;)))
double bonds in one molecule;
(ROOT (S (NP (DT A) (JJ double) (NN bond)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD one) (NN sigma) (NN bond)) (CC and) (NP (CD one) (NN pi) (NN bond))))) (. .)))