( ( Mercury ( -LRB- ( Hg -RRB- ) ) ) ( ( is ( ( the ( only metal ) ) ( in ( ( a ( liquid form ) ) ( at ( room temperature ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Mercury)) (PRN (-LRB- -LRB-) (NP (NNP Hg)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT the) (JJ only) (NN metal)) (PP (IN in) (NP (NP (DT a) (JJ liquid) (NN form)) (PP (IN at) (NP (NN room) (NN temperature))))))) (. .)))
Mercury (Hg) is the only metal in a liquid form 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))) (. .)))