Question: Which Secretary of State for Work and Pensions, who also served as the MP for Pontefract and Castleford since 1997, is associated with John Webster Robertson?
Sentence (from "John Robertson (Glasgow MP)"): John Webster Robertson (born 17 April 1952) is a British Labour Party politician, who was the Member of Parliament (MP) for Glasgow North West from 2000-2015.
Relevant evidence: No