( ( The ( water vapor ) ) ( ( may ( ( ( ( move over ) ( the land ) ) and ) ( condense ( to ( ( ( form clouds ) , ) ( allowing ( the ( water ( to ( ( return ( to ( ( the ( earth 's ) ) surface ) ) ) ( as ( precipitation ( -LRB- ( ( ( rain or ) snow ) -RRB- ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN water) (NN vapor)) (VP (MD may) (VP (VP (VB move) (PRT (RP over)) (NP (DT the) (NN land))) (CC and) (VP (VB condense) (S (VP (TO to) (VP (VB form) (NP (NNS clouds)) (, ,) (S (VP (VBG allowing) (NP (DT the) (NN water) (S (VP (TO to) (VP (VB return) (PP (TO to) (NP (NP (DT the) (NN earth) (POS 's)) (NN surface))) (PP (IN as) (NP (NP (NN precipitation)) (PRN (-LRB- -LRB-) (NP (NP (NN rain)) (CC or) (NP (NN snow))) (-RRB- -RRB-)))))))))))))))) (. .)))
The water vapor may move over the land and condense to form clouds, allowing the water to return to the earth's surface as precipitation (rain or snow).
(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))))))))))) (. .)))