( ( ( evaporation ( ( The process ) ( of water ) ) ) ( as ( ( a liquid ) ( changing ( to ( gas ( -LRB- ( ( water vapor ) -RRB- ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB evaporation) (NP (NP (DT The) (NN process)) (PP (IN of) (NP (NN water)))) (PP (IN as) (NP (NP (DT a) (NN liquid)) (VP (VBG changing) (PP (TO to) (NP (NP (NN gas)) (PRN (-LRB- -LRB-) (NP (NN water) (NN vapor)) (-RRB- -RRB-)))))))) (. .)))
evaporation The process of water as a liquid changing to gas (water vapor).
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (JJ liquid) (NN water) (NNS changes)) (VP (TO to) (VP (VB water) (NP (NN vapor)))))) (NP (PRP it)) (VP (VBZ is) (VP (VBN called) (NP (NN evaporation)))) (. .)))
When liquid water changes to water vapor it is called evaporation.