( ( When ( ( the wind ) blows ) ) ( , ( ( great waves ) ( ( rise ( on ( the ocean ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT the) (NN wind)) (VP (VBZ blows)))) (, ,) (NP (JJ great) (NNS waves)) (VP (VBP rise) (PP (IN on) (NP (DT the) (NN ocean)))) (. .)))
When the wind blows, great waves rise on the ocean.
(ROOT (S (NP (JJS Most) (NN ocean) (NNS waves)) (VP (VBP are) (VP (VBN caused) (PP (IN by) (NP (NN wind))))) (. .)))