( ( From ( ( ( ( ( ( ( the focus ) ( of ( an earthquake ) ) ) , ) ( ( the ( two types ) ) ( of ( ( body waves ) ( -LRB- ( ( ( P and ) S ) -RRB- ) ) ) ) ) ) , ) and ) ( ( two types ) ( of ( surface waves ) ) ) ) ) ( ( -LRB- ( ( ( ( Love and ) Rayleigh ) ( , ( which ( ( are S-waves ) ( trapped ( near ( the surface ) ) ) ) ) ) ) -RRB- ) ) ( ( radiate ( in ( all directions ) ) ) . ) ) )
(ROOT (S (PP (IN From) (NP (NP (NP (DT the) (NN focus)) (PP (IN of) (NP (DT an) (NN earthquake)))) (, ,) (NP (NP (DT the) (CD two) (NNS types)) (PP (IN of) (NP (NP (NN body) (NNS waves)) (PRN (-LRB- -LRB-) (NP (NNP P) (CC and) (NNP S)) (-RRB- -RRB-))))) (, ,) (CC and) (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (NN surface) (NNS waves)))))) (PRN (-LRB- -LRB-) (S (NP (NNP Love) (CC and) (NNP Rayleigh)) (, ,) (NP (WDT which)) (VP (VBP are) (ADVP (RB S-waves)) (VP (VBN trapped) (PP (IN near) (NP (DT the) (NN surface)))))) (-RRB- -RRB-)) (VP (VB radiate) (PP (IN in) (NP (DT all) (NNS directions)))) (. .)))
From the focus of an earthquake, the two types of body waves (P and S), and two types of surface waves (Love and Rayleigh, which are S-waves trapped near the surface) radiate in all directions.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD two) (NNS types)) (PP (IN of) (NP (NN surface) (NNS waves))))) (. .)))