Question: Which region did this son of Marion Kozak and British politician who was Leader of the Labour Party and Leader of the Opposition in the 2010s, represent as Member of Parliament in 2005?
Sentence (from "Ad Melkert"): He served as a Member of the House of Representatives from 3 June 1986 until 22 August 1994 when he became Minister of Social Affairs and Employment in the Cabinet Kok I following the Dutch general election of 1994.
Relevant evidence: No