(S (S (SBAR (IN While) (S (NP (BASENP (DT the) (NNP Department)) (PP (IN of) (BASENP (NNP Homeland) (NNP Security)))) (VP (VP (VBD did) (RB not)) (VP (VB disclose) (SBAR (WHNP (WDT which) (NNS cities)) (S (VP (VBD were) (VP (VBN mentioned))))))))) (COMMA ,) (S (BASENP (DT an) (JJ unnamed) (NN department) (NN official)) (VP (VBZ has) (VP (VBN said) (SBAR (S (NP (BASENP (DT the) (NNS cities)) (VP (VBN named))) (VP (VBD were) (NP (NP (NP (NP (NP (NP (BASENP (NNP Atlanta)) (COMMA ,) (BASENP (NNP Miami))) (COMMA ,) (BASENP (NNP New) (NNP York))) (COMMA ,) (BASENP (NNP Seattle))) (COMMA ,) (BASENP (NNP Houston))) (COMMA ,) (BASENP (NNP Oakland) (COMMA ,) (NNP California))) (CONJP (COMMA ,) (CC and)) (BASENP (NNP Cleveland) (COMMA ,) (NNP Ohio)))))))))) (PERIOD .))