( ( ( ( Mercury , ) ( ( ( a metal ) ( with ( such ( a ( low ( melting point ) ) ) ) ) ) ( that ( it ( 's ( a ( ( liquid ( at room ) ) temperature ) ) ) ) ) ) ) , ) ( ( ( ( ( binds ( to ( sulfur atoms ) ) ) ( in ( living cells ) ) ) and ) ( destroys ( ( ( important enzymes ) , ) ( such ( as ( those ( that ( control ( nerve cells ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Mercury)) (, ,) (NP (NP (DT a) (NN metal)) (PP (IN with) (NP (PDT such) (DT a) (JJ low) (JJ melting) (NN point))) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ 's) (NP (DT a) (ADJP (JJ liquid) (PP (IN at) (NP (NN room)))) (NN temperature)))))) (, ,)) (VP (VP (VBZ binds) (PP (TO to) (NP (NN sulfur) (NNS atoms))) (PP (IN in) (NP (VBG living) (NNS cells)))) (CC and) (VP (VBZ destroys) (NP (NP (JJ important) (NNS enzymes)) (, ,) (PP (JJ such) (IN as) (NP (NP (DT those)) (SBAR (WHNP (WDT that)) (S (VP (VBP control) (NP (NN nerve) (NNS cells)))))))))) (. .)))
Mercury, a metal with such a low melting point that it's a liquid at room temperature, binds to sulfur atoms in living cells and destroys important enzymes, such as those that control nerve cells.
(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)))))))) (. .)))