( ( 5.1.8 ( Mercury ( Elemental mercury ) ) ) ( ( is ( ( a ( metallic element ) ) ( that ( is ( liquid ( at ( room temperature ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (CD 5.1.8) (NNP Mercury) (NNP Elemental) (NN mercury)) (VP (VBZ is) (NP (NP (DT a) (JJ metallic) (NN element)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ liquid) (PP (IN at) (NP (NN room) (NN temperature))))))))) (. .)))
5.1.8 Mercury Elemental mercury is a metallic element that is liquid 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))) (. .)))