( ( ( Such states ) ( as ( ( ( ( ( ( ( ( ( inert ( gas narcosis ) ) , ) ( carbon ( dioxide toxicity ) ) ) , ) ( oxygen toxicity ) ) , ) HPNS ) , ) ( ( deep ( water blackout ) ) all ) ) ) ) ( ( can ( cause ( reactions ( that ( are ( similar ( to ( ( ( a ( psychoneurotic reaction ) ) or ) ( one ( of ( the ( organic ( cerebral syndromes ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Such) (NNS states)) (PP (IN as) (NP (NP (JJ inert) (NN gas) (NNS narcosis)) (, ,) (NP (NN carbon) (NN dioxide) (NN toxicity)) (, ,) (NP (NN oxygen) (NN toxicity)) (, ,) (NP (NNS HPNS)) (, ,) (NP (NP (JJ deep) (NN water) (NN blackout)) (NP (DT all)))))) (VP (MD can) (VP (VB cause) (NP (NP (NNS reactions)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADJP (JJ similar) (PP (TO to) (NP (NP (DT a) (JJ psychoneurotic) (NN reaction)) (CC or) (NP (NP (CD one)) (PP (IN of) (NP (DT the) (JJ organic) (JJ cerebral) (NNS syndromes))))))))))))) (. .)))
Such states as inert gas narcosis, carbon dioxide toxicity, oxygen toxicity, HPNS, deep water blackout all can cause reactions that are similar to a psychoneurotic reaction or one of the organic cerebral syndromes.
(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)))))) (. .)))