(S (S (BASENP (NN News) (NNS sources)) (VP (VBP speculate) (SBAR (IN that) (S (BASENP (NNP Winfrey)) (VP (MD will) (VP (VP (VB air) (NP (BASENP (DT a) (NN replacement)) (PP (IN on) (BASENP (DT the) (NNP Oprah) (NNP Winfrey) (NNP Network))))) (PP (IN in) (BASENP (NN 2011))))))))) (PERIOD .))