( Evaporation ( ( is ( ( the process ) ( ( by which ) ( ( a liquid ) ( is ( changed ( into ( a vapor ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Evaporation)) (VP (VBZ is) (NP (NP (DT the) (NN process)) (SBAR (WHPP (IN by) (WHNP (WDT which))) (S (NP (DT a) (NN liquid)) (VP (VBZ is) (VP (VBN changed) (PP (IN into) (NP (DT a) (NN vapor))))))))) (. .)))
Evaporation is the process by which a liquid is changed into a vapor.
(ROOT (S (NP (NNP Evaporation)) (VP (VBZ is) (ADJP (JJ responsible) (PP (IN for) (S (VP (VBG changing) (NP (JJ liquid) (NN water)) (PP (IN into) (NP (NN water) (NN vapor)))))))) (. .)))