( He ( ( was ( in ( ( an ocean ) ( with ( ( a lot ) ( of ( ( wind and ) waves ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD was) (PP (IN in) (NP (NP (DT an) (NN ocean)) (PP (IN with) (NP (NP (DT a) (NN lot)) (PP (IN of) (NP (NN wind) (CC and) (NNS waves)))))))) (. .)))
He was in an ocean with a lot of wind and waves.
(ROOT (S (NP (NNP Ocean) (NNS waves)) (VP (VBP are) (ADVP (RB mainly)) (VP (VBN caused) (PP (IN by) (NP (NN wind))))) (. .)))