( ( ( Water vapor ) ( in ( the atmosphere ) ) ) ( ( ( ( condenses ( into clouds ) ) and ) ( ( is eventually ) ( followed ( by ( ( precipitation , ) ( which ( ( returns water ) ( to ( ( the ( earth 's ) ) surface ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Water) (NNP vapor)) (PP (IN in) (NP (DT the) (NN atmosphere)))) (VP (VP (VBZ condenses) (PP (IN into) (NP (NNS clouds)))) (CC and) (VP (VBZ is) (ADVP (RB eventually)) (VP (VBN followed) (PP (IN by) (NP (NP (NN precipitation)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ returns) (NP (NN water)) (PP (TO to) (NP (NP (DT the) (NN earth) (POS 's)) (NN surface))))))))))) (. .)))
Water vapor in the atmosphere condenses into clouds and is eventually followed by precipitation, which returns water to the earth's surface.
(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))))))))))) (. .)))