(S (S (BASENP (DT This) (NN attack)) (VP (VBD was) (VP (VBN followed) (PP (IN by) (NP (NP (BASENP (DT a) (JJ triple) (NN attack)) (PP (IN in) (BASENP (NNP Peshawar)))) (PP (IN by) (BASENP (JJ suspected) (JJ Islamist) (NNS insurgents)))))))) (PERIOD .))