(S (S (BASENP (JJ Last) (NN year)) (S (S (NP (EX there)) (VP (VP (VBD were) (NP (BASENP (JJ similar) (JJ false) (JJ positive) (NNS reports)) (PP (IN of) (BASENP (NN ricin))))) (PP (IN in) (BASENP (NNP London))))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBD were) (VP (ADVP (RB further)) (VP (VBN publicized) (PP (IN by) (NP (BASENP (NNP Vice) (NNP President) (NNP Cheney)) (CC and) (NP (NP (BASENP (NNP Secretary)) (PP (IN of) (BASENP (NNP State)))) (BASENP (NNP Colin) (NNP L.) (NNP Powell)))))))))))) (PERIOD .))