( ( The water ) ( ( can ( oxidize ( the ( dioxide ( to ( ( ( produce ( the ( higher oxide ) ) ) and ) ( ( generate ( ( large quantities ) ( of ( hydrogen gas ) ) ) ) ( if ( stored ( for ( an ( extended period ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN water)) (VP (MD can) (VP (VB oxidize) (NP (DT the) (NN dioxide) (S (VP (TO to) (VP (VP (VB produce) (NP (DT the) (JJR higher) (NN oxide))) (CC and) (VP (VB generate) (NP (NP (JJ large) (NNS quantities)) (PP (IN of) (NP (NN hydrogen) (NN gas)))) (SBAR (IN if) (S (VP (VBN stored) (PP (IN for) (NP (DT an) (JJ extended) (NN period))))))))))))) (. .)))
The water can oxidize the dioxide to produce the higher oxide and generate large quantities of hydrogen gas if stored for an extended period.
(ROOT (S (NP (NNP Water)) (VP (VBZ is) (NP (NP (DT an) (NN oxide)) (PP (IN of) (NP (NN hydrogen))))) (. .)))