( ( ( All metals ) ( except mercury ) ) ( ( are ( solid ( at ( room temperature ) ) ) ) . ) )
(ROOT (S (NP (NP (DT All) (NNS metals)) (PP (IN except) (NP (NN mercury)))) (VP (VBP are) (ADJP (JJ solid) (PP (IN at) (NP (NN room) (NN temperature))))) (. .)))
All metals except mercury are solid at room temperature.
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (RB not) (NP (DT a) (JJ solid) (ADJP (RB even) (PP (IN at) (NP (NN room)))) (NN temperature))) (. .)))