(S (S (S (VP (ADVP (RB Allegedly)) (VP (VBN involved) (PP (IN in) (NP (NP (NP (BASENP (DT the) (JJ second) (NN set)) (PP (IN of) (NP (BASENP (NNS attacks)) (PP (IN on) (BASENP (NNP London)))))) (PP (IN in) (BASENP (NNP July)))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBD targeted) (NP (BASENP (DT the) (NN city) (POS 's)) (BASENP (JJ public) (NN transport) (NN infrastructure))))))))))) (COMMA ,) (S (BASENP (NNP Osman)) (VP (VBD was) (VP (VP (VP (VBN arrested) (PP (IN in) (BASENP (NNP Rome)))) (PP (IN by) (BASENP (JJ Italian) (NNS police)))) (PP (IN on) (NP (BASENP (NNP July) (NN 29)) (COMMA ,) (NP (BASENP (RB just) (NN one) (NN week)) (PP (IN after) (BASENP (DT the) (JJ failed) (NNS attacks)))))))))) (PERIOD .))