(S (S (NP (BASENP (DT The) (NN cancellation)) (PP (IN of) (BASENP (DT the) (NN tour)))) (VP (VBZ has) (VP (VBN come) (PP (BASENP (NNS days)) (PP (IN after) (NP (BASENP (DT a) (VBN failed) (NN bomb) (NN attack)) (PP (IN on) (BASENP (NNP London))))))))) (PERIOD .))