(S (S (S (BASENP (NNP Tehrik-i-Taliban) (NNP Pakistan)) (VP (VBZ has) (VP (VBN claimed) (NP (BASENP (NN responsibility)) (PP (IN for) (BASENP (DT the) (NN attack))))))) (COLON ;) (S (BASENP (DT a) (NN spokesperson)) (VP (VBD said) (SBAR (S (BASENP (PRP it)) (VP (VBD was) (NP (BASENP (DT a) (NN revenge) (NN attack)) (PP (IN for) (NP (NP (NP (BASENP (DT the) (NN killing)) (PP (IN of) (BASENP (NNP Osama) (NNP bin) (NNP Laden)))) (PP (IN by) (BASENP (NNP U.S.) (JJ special) (NNS forces)))) (BASENP (JJR earlier) (DT this) (NN month))))))))))) (PERIOD .))