( That ( ( ( ( is , ) ( at ( the mirror ) ) ) surfaces ) . ) )
(ROOT (S (NP (DT That)) (VP (VBZ is) (, ,) (PP (IN at) (NP (DT the) (NN mirror))) (ADVP (RB surfaces))) (. .)))
That is, at the mirror surfaces.
(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))))) (. .)))