( ( ( The mirror ) ( in ( ( the bathroom ) ( during ( a shower ) ) ) ) ) ( ( ( becomes foggy ) ( because ( ( ( warmer ( water vapor ) ) ( in ( the air ) ) ) ( hits ( ( the ( cooler surface ) ) ( of ( the mirror ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN mirror)) (PP (IN in) (NP (NP (DT the) (NN bathroom)) (PP (IN during) (NP (DT a) (NN shower)))))) (VP (VBZ becomes) (ADJP (JJ foggy)) (SBAR (IN because) (S (NP (NP (JJR warmer) (NN water) (NN vapor)) (PP (IN in) (NP (DT the) (NN air)))) (VP (VBZ hits) (NP (NP (DT the) (JJR cooler) (NN surface)) (PP (IN of) (NP (DT the) (NN mirror)))))))) (. .)))
The mirror in the bathroom during a shower becomes foggy because warmer water vapor in the air hits the cooler surface of the mirror.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT the) (NN water)) (VP (VBP vapor) (PP (IN from) (NP (DT a) (JJ hot) (NN shower) (NNS contacts))) (NP (NP (DT the) (JJR cooler) (NN surface)) (PP (IN of) (NP (DT a) (NN mirror))))))) (, ,) (NP (DT the) (NN result)) (VP (VBZ is) (SBAR (IN that) (S (NP (NNP foggy)) (VP (VBP mirror))))) (. .)))