(S (S (BASENP (DT Those) (NNS amendments)) (VP (MD would) (VP (VB be) (VP (VP (VP (VBN voted) (PP (IN on))) (PP (IN in) (BASENP (DT a) (NN referendum)))) (PP (IN within) (BASENP (NN four) (NNS months))))))) (PERIOD .))