Question: Who was the Minister for Development Cooperation when Pronk was serving as their spokesperson? Passage:Pronk was elected as a Member of the House of Representatives after the election of 1971, taking office on 11 May 1971 serving as a frontbencher and the spokesperson for Development Cooperation and deputy spokesperson for Housing and Spatial Planning and Kingdom Relations. Pronk was selected as a Member of the European Parliament and dual served in those positions, taking office on 13 March 1973. After the election of 1972 Pronk was appointed as Minister for Development Cooperation in the Cabinet Den Uyl, taking office on 11 May 1973. The Cabinet Den Uyl fell on 22 March 1977 after four years of tensions in the coalition and continued to serve in a demissionary capacity. After the election of 1977 Pronk returned as a Member of the House of Representatives, taking office on 8 June 1977 but he was still serving in the cabinet and because of dualism customs in the constitutional convention of Dutch politics he couldn't serve a dual mandate he subsequently resigned as a Member of the House of Representatives on 8 September 1977. The Cabinet Den Uyl was replaced by the Van Agt-Wiegel cabinet following the cabinet formation of 1977 on 19 December 1977. Pronk subsequently returned as a Member of the House of Representatives after the resignation of Wijnie Jabaaij taking office on 16 January 1978 serving as a frontbencher and spokesperson for Development Cooperation and deputy spokesperson for Foreign Affairs and Kingdom Relations. In July 1980 Pronk was nominated as Assistant Secretary-General of the United Nations Conference on Trade and Development (UNCTAD), he resigned as a Member of the House of Representatives the same day he was installed as Assistant Secretary-General, taking office on 18 August 1980. After the election of 1986 Pronk returned again as a Member of the House of Representatives, taking office on 3 June 1986 serving as a frontbencher and spokesperson for Development Cooperation, Agriculture and Fisheries and deputy spokesperson for Housing and Spatial Planning. After the election of 1989 Pronk was again appointed as Minister for Development Cooperation in the Cabinet Lubbers III, taking office on 7 November 1989. Pronk served as acting Minister of Defence from 6 February 1991 until 3 March 1991 during a medical leave of absence of Relus ter Beek. After election of 1994 Pronk once again returned as a Member of the House of Representatives, taking office on 17 May 1994. Following the cabinet formation of 1994 Pronk continued as Minister for Development Cooperation in the Cabinet Kok I, taking office on 22 August 1994. After election of 1998 Pronk again returned as a Member of the House of Representatives, taking office on 19 May 1998. Following the cabinet formation of 1998 Pronk was appointed as Minister of Housing, Spatial Planning and the Environment in the Cabinet Kok II, taking office on 3 August 1998. In October 2001 Pronk announced that he wouldn't stand for the election of 2002. The Cabinet Kok II resigned on 16 April 2002 following the conclusions of the NIOD report into the Srebrenica massacre during the Bosnian War and continued to serve in a demissionary capacity. The Cabinet Kok II was replaced by the Cabinet Balkenende I following the cabinet formation of 2002 on 22 July 2002. In August 2002 Pronk was appointed as Special Envoy of the Secretary-General for the Earth Summit 2002 serving from 1 September 2002 until 31 December 2002. Pronk also served as a distinguished professor of International Development at the International Institute of Social Studies from 1 January 2003 until 1 July 2010. In June 2004 he was nominated as the first Special Representative of the Secretary-General for the United Nations Mission in Sudan serving 1 July 2004 until 10 December 2006. 

Output: Pronk was elected as a Member of the House of Representatives after the election of 1971, taking office on 11 May 1971 serving as a frontbencher and the spokesperson for Development Cooperation and deputy spokesperson for Housing and Spatial Planning and Kingdom Relations