(S (S (BASENP (DT The) (NN ruling)) (VP (VBZ rejects) (NP (BASENP (DT an) (JJ electoral) (NN challenge)) (PP (IN by) (NP (BASENP (NNP Obame) (COMMA ,) (NNP Mamboundou)) (CC and) (NP (BASENP (JJ other) (NN opposition) (NNS candidates)) (SBAR (WHNP (WP who)) (S (VP (VP (VBD accused) (BASENP (JJ electoral) (NNS officials))) (PP (IN of) (NP (BASENP (JJ massive) (NN vote) (NN fraud)) (SBAR (S (VP (TO to) (VP (VB benefit) (BASENP (NNP Bongo))))))))))))))))) (PERIOD .))