sentences:  From 1957 to 1961 he held a seat on the Consultative Assembly of the Council of Europe and from 1961 to 1963 in the European Parliament.In the successive administrations headed by Marijnen, Cals and Zijlstra between 24 July 1963 and 5 April 1967 he was Deputy Prime Minister with additional responsibility for matters concerning Suriname and the Netherlands Antilles, and Minister of Agriculture and Fisheries.In 1967 he returned to the House of Representatives and became leader of the parliamentary Anti-Revolutionary Party.