( ( ( The change ) ( from ( liquid ( to gas ) ) ) ) ( ( is ( ( ( evaporation and ) ( the product ) ) ( is ( water vapor ) ) ) ) ; ) )
(ROOT (S (NP (NP (DT The) (NN change)) (PP (IN from) (NP (NP (NN liquid)) (PP (TO to) (NP (NN gas)))))) (VP (VBZ is) (SBAR (S (NP (NP (NN evaporation)) (CC and) (NP (DT the) (NN product))) (VP (VBZ is) (NP (NN water) (NN vapor)))))) (: ;)))
The change from liquid to gas is evaporation and the product is 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.