(S (S (BASENP (DT The) (NN violence)) (VP (VBZ comes) (PP (IN before) (NP (NP (BASENP (NNP Thursday) (POS 's)) (BASENP (JJ presidential) (NN election))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (BASENP (NNS militants)) (VP (VBP have) (VP (VBN promised) (S (VP (TO to) (VP (VB disrupt)))))))))))) (PERIOD .))