(S (S (S (BASENP (NNP Endeavor)) (VP (VBZ has) (NP (BASENP (NN one) (JJR more) (NN mission)) (VP (VBG remaining))))) (CONJP (COMMA ,) (CC and)) (S (SBAR (IN if) (S (S (BASENP (DT an) (NN emergency) (NN rescue)) (VP (VBZ is) (VP (VBN needed)))) (CC or) (S (BASENP (JJR more) (NN funding)) (VP (VBZ is) (VP (VBN secured)))))) (COMMA ,) (S (S (BASENP (NNP Atlantis)) (VP (MD will) (VP (ADVP (RB also)) (VP (VB fly) (ADVP (RB once) (RBR more)))))) (SBAR (IN before) (S (BASENP (DT the) (JJ entire) (NN fleet)) (VP (VBZ is) (VP (VBN retired)))))))) (PERIOD .))