( ( ( ( The ( wind howls ) ) and ) ( ( the motion ) ( of ( the waves ) ) ) ) ( ( are ( like ( the ocean ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN wind) (NNS howls)) (CC and) (NP (NP (DT the) (NN motion)) (PP (IN of) (NP (DT the) (NNS waves))))) (VP (VBP are) (PP (IN like) (NP (DT the) (NN ocean)))) (. .)))
The wind howls and the motion of the waves are like the ocean.
(ROOT (S (NP (NNP Ocean) (NNS waves)) (VP (VBP are) (ADVP (RB mainly)) (VP (VBN caused) (PP (IN by) (NP (NN wind))))) (. .)))