( It ( ( ( ( forms ( a ( 180 ( degree ( bonding angle ) ) ) ) ) and ) ( consists ( of ( ( ( one ( sigma bond ) ) and ) ( two ( pi bonds ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VP (VBZ forms) (NP (DT a) (CD 180) (NN degree) (NN bonding) (NN angle))) (CC and) (VP (VBZ consists) (PP (IN of) (NP (NP (CD one) (NN sigma) (NN bond)) (CC and) (NP (CD two) (NN pi) (NNS bonds)))))) (. .)))
It forms a 180 degree bonding angle and consists of one sigma bond and two pi bonds.
(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))))) (. .)))