(S (S (BASENP (NNP Olmert)) (VP (VBZ is) (VP (VBG facing) (NP (NP (BASENP (NNS challenges)) (PP (IN by) (BASENP (JJ other) (NNS leaders)))) (SBAR (S (VP (TO to) (VP (VP (VB take) (PRT (RP over))) (BASENP (DT the) (NN prime) (NN ministership)))))))))) (PERIOD .))