(S (S (BASENP (DT The) (NN space) (NN shuttle) (NNP Discovery)) (VP (VBZ is) (VP (VP (VBN coming) (ADVP (RB back) (PP (TO to) (BASENP (NNP Earth))))) (PP (IN after) (NP (BASENP (NN 11) (NNS days)) (PP (IN in) (BASENP (NN orbit)))))))) (PERIOD .))