rtokens: His statement was interpreted as a significant victory for Clarke and fellow pro-European Michael Heseltine , deputy prime minister .
pos: NNP VBD NN IN NNP PRP MD VB PRP$ NNS JJ IN NN NN .
tokens: Major told parliament on Thursday he would keep his options open on single-currency membership .
ltokens: Clarke denied on Thursday he had threatened to resign and said his position on the single currency was in tune with that of Prime Minister John Major .