( ( A ( chloride ( ion ( and ( bicarbonate ( ion exchange ) ) ) ) ) ) ( pump B. ) )
(ROOT (S (NP (DT A) (NN chloride) (NN ion) (CC and) (NN bicarbonate) (NN ion) (NN exchange)) (VP (VBP pump) (NP (NNP B.)))))
A chloride ion and bicarbonate ion exchange pump B.
(ROOT (S (PP (IN In) (NP (DT the) (NNS lungs))) (, ,) (NP (NN bicarbonate)) (VP (VBZ is) (VP (VBN transported) (PRT (RP back)) (PP (IN into) (NP (NP (DT the) (JJ red) (NN blood) (NNS cells)) (PP (IN in) (NP (NN exchange))))) (PP (IN for) (NP (NN chloride))))) (. .)))