(S (S (BASENP (NNP European) (NNP Union) (NNS observers)) (VP (VBP have) (VP (VBN claimed) (SBAR (IN that) (S (NP (NP (QP (ADJP (ADJP (RB as) (JJ many)) (IN as)) (NN one))) (PP (IN in) (BASENP (NN four) (NNS votes)))) (VP (MD may) (VP (VB be) (PP (IN in) (BASENP (NN doubt)))))))))) (PERIOD .))