(S (S (BASENP (NN Yesterday)) (COMMA ,) (S (BASENP (NNP Republican) (NNP Fred) (NNP Thompson)) (VP (VBD confirmed) (NP (BASENP (PRPD his) (NN campaign)) (PP (IN for) (NP (BASENP (DT the) (NNP United) (NNPS States) (JJ presidential) (NN election)) (COMMA ,) (BASENP (NN 2008)))))))) (PERIOD .))