(S (S (NP (BASENP (NNP Barack) (NNP Obama)) (COMMA ,) (NP (NP (BASENP (DT the) (JJ junior) (NN senator)) (PP (IN from) (BASENP (NNP Illinois)))) (CC and) (BASENP (NN 2008) (NNP US) (JJ presidential) (NN candidate)))) (VP (VBZ has) (VP (VBN swept) (NP (NP (NP (BASENP (DT all) (NN three)) (PP (IN of) (NP (BASENP (NN today) (POS 's)) (BASENP (JJ Democratic) (NNS contests))))) (COMMA ,) (NP (BASENP (NN two) (NNS caucuses)) (PP (IN in) (BASENP (NNP Nebraska) (CC and) (NNP Washington))))) (CC and) (NP (BASENP (DT the) (NN primary)) (PP (IN in) (BASENP (NNP Louisiana)))))))) (PERIOD .))