( ( ( ( ( ( The oxidation ) ( of ( ( hydrogen sulfide ) ( to sulfate ) ) ) ) , ) ( a ( different ( sulfur compound ) ) ) ) , ) ( ( provides ( bacteria ( ( ( living around ) ( the vents ) ) ( with ( ( the energy ) ( necessary ( to ( ( ( ( ( produce ( organic matter ) ) , ) ( ( pretty ( much ( in ( the ( same way ) ) ) ) ) ( as ( ( the sun ) ( ( provides plants ) ( with ( the ( energy ( to ( perform photosynthesis ) ) ) ) ) ) ) ) ) ) and ) grow ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (DT The) (NN oxidation)) (PP (IN of) (NP (NP (NN hydrogen) (NN sulfide)) (PP (TO to) (NP (NN sulfate)))))) (, ,) (NP (DT a) (JJ different) (NN sulfur) (NN compound)) (, ,)) (VP (VBZ provides) (NP (NP (NNS bacteria)) (VP (VBG living) (PRT (RP around)) (NP (DT the) (NNS vents)) (PP (IN with) (NP (NP (DT the) (NN energy)) (ADJP (JJ necessary) (S (VP (TO to) (VP (VP (VB produce) (NP (JJ organic) (NN matter))) (, ,) (VP (ADJP (RB pretty) (JJ much) (PP (IN in) (NP (DT the) (JJ same) (NN way)))) (SBAR (IN as) (S (NP (DT the) (NN sun)) (VP (VBZ provides) (NP (NNS plants)) (PP (IN with) (NP (DT the) (NN energy) (S (VP (TO to) (VP (VB perform) (NP (NN photosynthesis))))))))))) (CC and) (VP (VB grow))))))))))) (. .)))
The oxidation of hydrogen sulfide to sulfate, a different sulfur compound, provides bacteria living around the vents with the energy necessary to produce organic matter, pretty much in the same way as the sun provides plants with the energy to perform photosynthesis and grow.
(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))))))) (. .)))