( ( ( the surface ) ( of ( a mirror ) ) ) ( ( is not ) . ) )
(ROOT (S (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (DT a) (NN mirror)))) (VP (VBZ is) (RB not)) (. .)))
the surface of a mirror is not.
(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))))) (. .)))