(S (S (BASENP (DT Some) (NNS observers)) (VP (VBD concluded) (SBAR (IN that) (S (BASENP (DT such) (NN fraud)) (VP (MD might) (VP (VB have) (VP (VBN affected) (NP (BASENP (DT the) (NN outcome)) (PP (IN in) (NP (NP (BASENP (NN one)) (PP (IN of) (NP (BASENP (DT the) (NNS contests)) (PP (IN for) (BASENP (NN parliament)))))) (CONJP (COMMA ,) (CC and)) (NP (BASENP (NN several)) (PP (IN of) (NP (BASENP (DT those)) (PP (IN for) (BASENP (DT the) (JJ provincial) (NNS assemblies)))))))))))))))) (PERIOD .))