(S (S (BASENP (DT This) (NN bombing)) (VP (VP (VBD was) (NP (BASENP (DT the) (JJS worst) (NN terrorist) (NN attack)) (PP (IN in) (BASENP (NNP Istanbul))))) (PP (IN since) (NP (BASENP (DT the) (NN 2003) (NNP Istanbul) (NNPS Bombings)) (COMMA ,) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (BASENP (NN truck) (NNS bombs)) (VP (VP (VBD exploded) (PP (IN outside) (BASENP (NN two) (NNP Istanbul) (NNS synagogues)))) (COMMA ,) (S (VP (VP (VBG killing) (BASENP (NN 23))) (CC and) (VP (VBG wounding) (NP (QP (ADVP (RBR more) (IN than)) (NN 300))))))))))))) (PERIOD .))