(S (S (BASENP (NNP Bongo)) (VP (VBZ has) (VP (VBN kept) (NP (BASENP (JJ interim) (NNP Prime) (NNP Minister) (NNP Paul) (NNP Mba)) (COMMA ,) (SBAR (WHNP (WP who)) (S (VP (VBZ has) (VP (VP (VBN served) (PP (IN in) (BASENP (DT the) (NN post)))) (PP (IN since) (NP (BASENP (NNP July)) (SBAR (WHADVP (WRB when)) (S (BASENP (PRPD his) (NN predecessor)) (VP (VP (VBD stepped) (PRT (RP down))) (S (VP (TO to) (VP (VB run) (PP (IN against) (BASENP (NNP Bongo))))))))))))))))))) (PERIOD .))