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 "Labour Party (UK) Shadow Cabinet election, 1993"): In addition, the Leader of the Labour Party and Deputy Leader (John Smith and Margaret Beckett, respectively) were members by virtue of those offices.
Relevant evidence: No