( There ( ( are ( ( two types ) ( of ( ( ( ( ( body waves ) , ) P-waves ) and ) S-waves ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (NP (NN body) (NNS waves)) (, ,) (NP (NNP P-waves)) (CC and) (NP (NNP S-waves)))))) (. .)))
There are two types of body waves, P-waves and S-waves.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (NN surface) (NNS waves))))) (. .)))