(S (S (BASENP (NNP Uribe)) (VP (VBD admitted) (SBAR (IN that) (S (BASENP (DT the) (JJ Colombian) (JJ armed) (NN conflict)) (VP (VBZ is) (NP (BASENP (DT a) (NN problem)) (SBAR (WHNP (WDT which)) (S (VP (MD must) (VP (VB be) (VP (VP (VBN solved) (PP (IN by) (BASENP (PRPD his) (NN country)))) (PP (IN despite) (NP (BASENP (DT the) (NNS disturbances)) (VP (VBN caused) (PP (IN by) (NP (BASENP (JJ subversive) (NNS groups)) (PP (IN in) (NP (BASENP (DT the) (JJ neighboring) (NNS countries)) (PP (TO to) (BASENP (NNP Colombia))))))))))))))))))))) (PERIOD .))