( GHB ( ( may ( cause ( ( a ( mild ( respiratory acidosis ) ) ) ( detectable ( with ( an ( arterial ( blood gas ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP GHB)) (VP (MD may) (VP (VB cause) (S (NP (DT a) (JJ mild) (JJ respiratory) (NNS acidosis)) (ADJP (JJ detectable) (PP (IN with) (NP (DT an) (JJ arterial) (NN blood) (NN gas))))))) (. .)))
GHB may cause a mild respiratory acidosis detectable with an arterial blood gas.
(ROOT (S (NP (JJ Respiratory) (NNS acidosis)) (VP (VBZ is) (VP (VBN considered) (S (VP (TO to) (VP (VB be) (ADJP (JJ problematic) (PP (IN because) (NP (NP (JJ excess) (NNS co2)) (PP (IN in) (NP (NN blood))))))))))) (. .)))