(S (S (BASENP (DT This)) (VP (VBZ is) (NP (NP (BASENP (DT the) (JJS latest)) (PP (IN of) (NP (BASENP (JJ many) (NN security) (NNS alerts)) (PP (IN in) (BASENP (NNP London)))))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (PP (IN at) (NP (BASENP (DT a) (JJ high) (NN state)) (PP (IN of) (BASENP (NN alert))))))))))) (PERIOD .))