( ( An ( underwater earthquake ) ) ( ( will ( cause ( the Tsunami ) ) ) . ) )
(ROOT (S (NP (DT An) (JJ underwater) (NN earthquake)) (VP (MD will) (VP (VB cause) (NP (DT the) (NNP Tsunami)))) (. .)))
An underwater earthquake will cause the Tsunami.
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN underwater) (NN earthquake)) (VP (VBZ creates) (NP (DT a) (NN tsunami))) (. .)))