( ( Downstream ( of ( ( ( ( ( the ( gas generator ) ) , ) ( the hydrogen ) ) and ) oxygen ) ) ) ( then ( ( ( are directly ) ( fed ( into ( the ( relevant ( plant systems ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (NNP Downstream)) (PP (IN of) (NP (NP (DT the) (NN gas) (NN generator)) (, ,) (NP (DT the) (NN hydrogen)) (CC and) (NP (NN oxygen))))) (ADVP (RB then)) (VP (VBP are) (ADVP (RB directly)) (VP (VBN fed) (PP (IN into) (NP (DT the) (JJ relevant) (NN plant) (NNS systems))))) (. .)))
Downstream of the gas generator, the hydrogen and oxygen then are directly fed into the relevant plant systems.
(ROOT (S (NP (NN Oxygen) (NN gas)) (VP (VBZ is) (VP (VBN given) (PRT (RP off)) (PP (IN by) (NP (NNS plants))))) (. .)))