( ( ( ( ( The ( water cycle ) ) , ) ( ( the ( continuous movement ) ) ( of ( water ( from ( ( ocean ( to ( ( air and ) land ) ) ) ( then ( back ( to ( ( the ocean ) ( in ( a ( cyclic pattern ) ) ) ) ) ) ) ) ) ) ) ) ) , ) ( ( is ( ( a ( central concept ) ) ( in meteorology ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN water) (NN cycle)) (, ,) (NP (NP (DT the) (JJ continuous) (NN movement)) (PP (IN of) (NP (NP (NN water)) (PP (IN from) (NP (NP (NN ocean)) (PP (TO to) (NP (NN air) (CC and) (NN land))) (ADVP (RB then) (RB back) (PP (TO to) (NP (NP (DT the) (NN ocean)) (PP (IN in) (NP (DT a) (JJ cyclic) (NN pattern))))))))))) (, ,)) (VP (VBZ is) (NP (NP (DT a) (JJ central) (NN concept)) (PP (IN in) (NP (NN meteorology))))) (. .)))
The water cycle, the continuous movement of water from ocean to air and land then back to the ocean in a cyclic pattern, is a central concept in meteorology.
(ROOT (S (NP (DT The) (NN water) (NN cycle)) (VP (VBZ involves) (NP (NP (NN movement)) (PP (IN of) (NP (NP (NN water)) (PP (IN between) (NP (NN air) (CC and) (NN land))))))) (. .)))