( There ( ( are ( ( two types ) ( of ( ( ( ( ( ( surface waves ) , ) ( Rayleigh waves ) ) ( -LRB- ( ( illustrated above ) -RRB- ) ) ) and ) ( Love waves ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (NP (NP (NN surface) (NNS waves)) (, ,) (NP (JJ Rayleigh) (NNS waves)) (PRN (-LRB- -LRB-) (VP (VBN illustrated) (PP (IN above))) (-RRB- -RRB-))) (CC and) (NP (NN Love) (NNS waves)))))) (. .)))
There are two types of surface waves, Rayleigh waves (illustrated above) and Love waves.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (NN surface) (NNS waves))))) (. .)))