( ( ( ( ( ( Mercury ( Switches ( Mercury switches ) ) ) ( are ( ( a switch ) ( that ( ( ( ( uses ( the fact ) ) ( that ( ( mercury metal ) ( conducts electricity ) ) ) ) , ) ( as ( do ( all metals ) ) ) ) ) ) ) ) , ) but ) ( ( mercury metal ) ( is ( ( a liquid ) ( at ( room temperatures ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Mercury) (NNP Switches) (NNP Mercury) (NNS switches)) (VP (VBP are) (NP (NP (DT a) (NN switch)) (SBAR (WHNP (WDT that)) (S (VP (VBZ uses) (NP (DT the) (NN fact)) (SBAR (IN that) (S (NP (NN mercury) (NN metal)) (VP (VBZ conducts) (NP (NN electricity))))) (, ,) (SBAR (IN as) (S (VP (VBP do) (NP (DT all) (NNS metals))))))))))) (, ,) (CC but) (S (NP (NN mercury) (NN metal)) (VP (VBZ is) (NP (NP (DT a) (NN liquid)) (PP (IN at) (NP (NN room) (NNS temperatures)))))) (. .)))
Mercury Switches Mercury switches are a switch that uses the fact that mercury metal conducts electricity, as do all metals, but mercury metal is a liquid at room temperatures.
(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))) (. .)))