( ( contain ( one ( double ( bond Three ) ) ) ) . )
(ROOT (S (VP (VB contain) (NP (CD one) (JJ double) (NN bond) (NNS Three))) (. .)))
contain one double bond Three.
(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))))) (. .)))