( ( By ( utilizing ( ( simple reactions ) ( between ( ( ( martian ( carbon dioxide ) ) and ) ( imported hydrogen ) ) ) ) ) ) ( , ( ( the astronauts ) ( ( will ( be ( able ( to ( produce ( methane ( , ( water ( , ( and oxygen ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN By) (S (VP (VBG utilizing) (NP (NP (JJ simple) (NNS reactions)) (PP (IN between) (NP (NP (NN martian) (NN carbon) (NN dioxide)) (CC and) (NP (VBN imported) (NN hydrogen)))))))) (, ,) (NP (DT the) (NNS astronauts)) (VP (MD will) (VP (VB be) (ADJP (JJ able) (S (VP (TO to) (VP (VB produce) (NP (NN methane) (, ,) (NN water) (, ,) (CC and) (NN oxygen)))))))) (. .)))
By utilizing simple reactions between martian carbon dioxide and imported hydrogen, the astronauts will be able to produce methane, water, and oxygen.
(ROOT (S (NP (NNP Combustion) (NNS reactions)) (VP (VBP involve) (S (NP (NP (DT the) (NN reaction)) (PP (IN of) (NP (NP (DT a) (NN hydrocarbon)) (PP (IN with) (NP (NN oxygen) (NN gas)))))) (VP (TO to) (VP (VB produce) (NP (NN water) (CC and) (NN carbon) (NN dioxide)))))) (. .)))