( ( Metallic mercury ) ( ( is ( a ( ( liquid ( at room ) ) temperature ) ) ) . ) )
(ROOT (S (NP (JJ Metallic) (NN mercury)) (VP (VBZ is) (NP (DT a) (ADJP (JJ liquid) (PP (IN at) (NP (NN room)))) (NN temperature))) (. .)))
Metallic mercury is a liquid at room temperature.
(ROOT (S (NP (NNP Mercury)) (VP (VBZ is) (NP (NP (DT the) (CD one) (NN metal)) (SBAR (WHNP (WDT that)) (S (VP (VBZ melts) (PP (IN below) (NP (NN room) (NN temperature)))))))) (. .)))