(S (S (NP (BASENP (JJ American) (NN celebutante) (CC and) (NN businesswoman)) (BASENP (NNP Paris) (NNP Hilton))) (VP (VBZ has) (VP (VBN bashed) (NP (NP (BASENP (DT a) (JJ recent) (JJ presidential) (NN campaign) (NN ad)) (PP (IN by) (BASENP (NN 2008) (NNP U.S.) (JJ presidential) (JJ hopeful) (NNP John) (NNP McCain)))) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (BASENP (PRP he)) (VP (VP (VBD compared) (BASENP (PRPD his) (NN rival) (NNP Barack) (NNP Obama))) (PP (TO to) (NP (BASENP (NNS celebrities)) (PP (IN such) (PP (IN as) (NP (BASENP (NNP Hilton)) (CC and) (BASENP (NNP Britney) (NNP Spears)))))))))))))) (PERIOD .))