(S (S (BASENP (PRP It)) (VP (VBZ is) (VP (VBN believed) (SBAR (IN that) (S (BASENP (DT the) (NN bomb)) (VP (VBD was) (VP (VP (VBN planted) (ADVP (RB there))) (PP (IN by) (BASENP (JJ dissident) (NNS republicans)))))))))) (PERIOD .))