( ( Hydrogen sulfide ) ( ( ( ( is ( ( produced ( in ( small amounts ) ) ) ( by ( ( some cells ) ( of ( the ( human body ) ) ) ) ) ) ) and ) ( has ( ( a number ) ( of ( biological ( signaling functions ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Hydrogen) (NNP sulfide)) (VP (VP (VBZ is) (VP (VBN produced) (PP (IN in) (NP (JJ small) (NNS amounts))) (PP (IN by) (NP (NP (DT some) (NNS cells)) (PP (IN of) (NP (DT the) (JJ human) (NN body))))))) (CC and) (VP (VBZ has) (NP (NP (DT a) (NN number)) (PP (IN of) (NP (JJ biological) (JJ signaling) (NNS functions)))))) (. .)))
Hydrogen sulfide is produced in small amounts by some cells of the human body and has a number of biological signaling functions.
(ROOT (S (NP (NNS Cells)) (VP (VBP are) (NP (NP (JJ small) (JJ biological) (NNS structures)) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (PRT (RP up)) (NP (NP (DT all) (VBG living) (NNS things)) (, ,) (PP (VBG including) (NP (DT the) (JJ human) (NN body))))))))) (. .)))