(S (S (BASENP (NNP Colombia)) (VP (VP (VBD admitted) (NP (BASENP (DT the) (NN payment)) (PP (IN of) (NP (BASENP (DT a) (NN reward)) (PP (IN for) (BASENP (NNP Granda))))))) (CONJP (COMMA ,) (CC but)) (VP (VBD rebutted) (NP (BASENP (NNS accusations)) (PP (IN of) (BASENP (NN bribery))))))) (PERIOD .))