( ( a -RRB- ) ( Respiratory ( ( acidosis ( ( ( b -RRB- ) ( ( Decreased elimination ) ( by ( lungs ( ( of ( ( CO2 c ) -RRB- ) ) ( Respiratory ( alkalosis ( d ( -RRB- Hypoventilation ) ) ) ) ) ) ) ) ) ( ( e -RRB- ) ( ( A mixture ) ( of ( the ( above 3 ) ) ) ) ) ) ) . ) ) )
(ROOT (S (LST (LS a) (-RRB- -RRB-)) (NP (NNP Respiratory)) (VP (VBZ acidosis) (NP (NP (LST (LS b) (-RRB- -RRB-)) (NP (NNP Decreased) (NN elimination)) (PP (IN by) (NP (NP (NNS lungs)) (PP (IN of) (PRN (S (NP (NNP CO2)) (VP (VBZ c))) (-RRB- -RRB-)) (NP (NNP Respiratory) (NNS alkalosis) (NNP d) (-RRB- -RRB-) (NNP Hypoventilation)))))) (NP (LST (LS e) (-RRB- -RRB-)) (NP (DT A) (NN mixture)) (PP (IN of) (NP (DT the) (JJ above) (CD 3)))))) (. .)))
a) Respiratory acidosis b) Decreased elimination by lungs of CO2 c) Respiratory alkalosis d) Hypoventilation e) A mixture of the above 3.
(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))))))))))) (. .)))