(S (S (NP (BASENP (DT The) (NN ad) (POS 's)) (NN purpose)) (VP (VBD was) (S (VP (TO to) (VP (VB blast) (NP (BASENP (NNP Democratic) (NNP Senate) (NN candidate) (NNP Harold) (NNP Ford) (NNP Jr)) (COMMA ,) (SBAR (WHNP (WP who)) (S (VP (VBZ is) (VP (VBG running) (PP (IN against) (BASENP (NNP Republican) (NNP Bob) (NNP Corker))))))))))))) (PERIOD .))