( ( ( ( Ocean waves ) , ) ( ( winds , ) currents ) ) . )
(ROOT (NP (NP (NNP Ocean) (NNS waves)) (, ,) (NP (NP (NNS winds)) (, ,) (NP (NNS currents))) (. .)))
Ocean waves, winds, currents.
(ROOT (S (NP (JJS Most) (NN ocean) (NNS waves)) (VP (VBP are) (VP (VBN caused) (PP (IN by) (NP (NN wind))))) (. .)))