( ( When ( there ( is wind ) ) ) ( , ( ( the waves ) ( ( ( ( arise and ) then ) ( ( dissolve back ) ( into ( the ocean ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (EX there)) (VP (VBZ is) (NP (NN wind))))) (, ,) (NP (DT the) (NNS waves)) (VP (VP (VBP arise)) (CC and) (RB then) (VP (VB dissolve) (PRT (RP back)) (PP (IN into) (NP (DT the) (NN ocean))))) (. .)))
When there is wind, the waves arise and then dissolve back into the ocean.
(ROOT (S (NP (NNP Ocean) (NNS waves)) (VP (VBP are) (ADVP (RB mainly)) (VP (VBN caused) (PP (IN by) (NP (NN wind))))) (. .)))