( ( In evaporation ) ( , ( ( a ( ( liquid ( -LRB- ( ( like water ) -RRB- ) ) ) changes ) ) ( ( state ( to ( become ( ( a gas ) ( -LRB- ( ( water vapor ) -RRB- ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN evaporation))) (, ,) (NP (DT a) (ADJP (ADJP (JJ liquid)) (PRN (-LRB- -LRB-) (PP (IN like) (NP (NN water))) (-RRB- -RRB-))) (NNS changes)) (VP (VBP state) (S (VP (TO to) (VP (VB become) (NP (NP (DT a) (NN gas)) (PRN (-LRB- -LRB-) (NP (NN water) (NN vapor)) (-RRB- -RRB-))))))) (. .)))
In evaporation, a liquid (like water) changes state to become a 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.