( ( ( The water ) ( in ( the tray ) ) ) ( ( ( evaporates , ) ( ( raising ( the humidity ) ) ( around ( the plants ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN water)) (PP (IN in) (NP (DT the) (NN tray)))) (VP (VBZ evaporates) (, ,) (S (VP (VBG raising) (NP (DT the) (NN humidity)) (PP (IN around) (NP (DT the) (NNS plants)))))) (. .)))
The water in the tray evaporates, raising the humidity around the plants.
(ROOT (S (NP (NNP Humidity) (NNP happens)) (VP (VBZ happens) (SBAR (WHADVP (WRB when)) (S (NP (JJ liquid) (NN water)) (VP (VBZ evaporates))))) (. .)))