( ( Gut flora ) ( ( produce ( compounds ( such ( as ( ( ( ( ( ( ( ( indole , ) skatole ) , ) and ) ( thiols ( -LRB- ( ( sulfur-containing compounds ) -RRB- ) ) ) ) , ) ( as ( well as ) ) ) ( the ( inorganic ( gas ( hydrogen sulfide ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Gut) (NNS flora)) (VP (VBP produce) (NP (NP (NNS compounds)) (PP (JJ such) (IN as) (NP (NP (NP (NN indole)) (, ,) (NP (NN skatole)) (, ,) (CC and) (NP (NP (NNS thiols)) (PRN (-LRB- -LRB-) (NP (JJ sulfur-containing) (NNS compounds)) (-RRB- -RRB-)))) (, ,) (CONJP (RB as) (RB well) (IN as)) (NP (DT the) (JJ inorganic) (NN gas) (NN hydrogen) (NN sulfide)))))) (. .)))
Gut flora produce compounds such as indole, skatole, and thiols (sulfur-containing compounds), as well as the inorganic gas hydrogen sulfide.
(ROOT (S (NP (NNP Hydrogen) (NNP sulfide)) (VP (VBZ is) (NP (NP (DT a) (ADJP (JJ noxious) (CC and) (JJ toxic)) (NN gas)) (VP (VBN produced) (PP (IN from) (S (VP (VBG decaying) (NP (JJ organic) (NN matter)))))) (SBAR (WHNP (WDT that)) (S (VP (VBZ contains) (NP (NN sulfur))))))) (. .)))