( ( ( ( The process ) ( by which ) ) ( water ( constantly ( ( ( circulates ( from ( the ocean ) ) ) , ) ( to ( the atmosphere ) ) ) ) ) ) ( , ( ( ( ( ( ( returning ( to ( ( the earth ) ( in ( ( some form ) ( of precipitation ) ) ) ) ) ) , ) and ) finally ) ( returning ( to ( the ocean ) ) ) ) . ) ) )
(ROOT (S (SBAR (WHNP (NP (DT The) (NN process)) (WHPP (IN by) (WHNP (WDT which)))) (S (NP (NN water)) (ADVP (RB constantly)) (VP (VBZ circulates) (PP (IN from) (NP (DT the) (NN ocean))) (, ,) (PP (TO to) (NP (DT the) (NN atmosphere)))))) (, ,) (S (VP (VBG returning) (PP (TO to) (NP (NP (DT the) (NN earth)) (PP (IN in) (NP (NP (DT some) (NN form)) (PP (IN of) (NP (NN precipitation))))))))) (, ,) (CC and) (ADVP (RB finally)) (S (VP (VBG returning) (PP (TO to) (NP (DT the) (NN ocean))))) (. .)))
The process by which water constantly circulates from the ocean, to the atmosphere, returning to the earth in some form of precipitation, and finally returning to the ocean.
(ROOT (S (NP (NNP Precipitation)) (VP (VBP are) (NP (NP (DT a) (JJ natural) (NN process)) (SBAR (WHNP (WDT that)) (S (VP (VBZ allows) (NP (NN water)) (S (VP (TO to) (VP (VB return) (ADVP (RB again)) (PP (TO to) (NP (NP (DT the) (NN earth) (POS 's)) (NN surface))))))))))) (. .)))