(S (S (ADVP (RB However)) (COMMA ,) (S (BASENP (DT this)) (VP (VBZ has) (VP (VBN failed) (S (VP (TO to) (VP (VB prevent) (S (BASENP (DT the) (NNS gangs)) (VP (VBG battling) (S (VP (TO to) (VP (VB control) (NP (BASENP (DT the) (JJ cocaine-smuggling) (NN trade) (NN run)) (PP (IN from) (BASENP (DT the) (NN city)))))))))))))))) (PERIOD .))