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?

full_context: Document 1: Steve Webb: Sir Steven John Webb (born 18 July 1965) is a British pensions commentator who was previously Liberal Democrat Member of Parliament (MP) for Northavon, 1997–2010 and for Thornbury and Yate, 2010–2015. He was the Minister of State for Pensions in the coalition government of David Cameron.
Document 2: Hilary Benn: Hilary James Wedgwood Benn (born 26 November 1953) is a British Labour Party politician who has been the Member of Parliament (MP) for Leeds Central since the by-election in 1999. He served in the cabinet from 2003–10, under the premierships of both Tony Blair and Gordon Brown. From 2010–16, he served in various Labour Party shadow cabinets, most recently as Shadow Foreign Secretary from May 2015 until June 2016, when he was dismissed by Labour leader Jeremy Corbyn. In October 2016, he was elected as the Chair of the new Exiting the European Union Select Committee.
Document 3: Yvette Cooper: Yvette Cooper (born 20 March 1969) is a Labour Party politician who has been the Member of Parliament (MP) for Normanton, Pontefract and Castleford since 2010, having served as the MP for Pontefract and Castleford since 1997.
Document 4: John Robertson (Paralympic sailor): John Robertson (born 11 February 1972) is a British Paralympic sailor. Robertson has represented Great Britain at three Summer Paralympics and with his colleagues Stephen Thomas and Hannah Stodel has won multiple medals in the Mixed Sonar class at the Disabled Sailing World Championships, including skippering his team to back to back gold medals in 2005 and 2006.
Document 5: John Healey (politician): John Healey (born 13 February 1960) is a British Labour Party politician and former trade union and charity campaigner, who has been the Member of Parliament (MP) for Wentworth and Dearne since 1997, and Minister of State for Housing. In 2010 he was elected to the shadow cabinet and appointed shadow health secretary. He stood down from the role in October 2011 and was succeeded by Andy Burnham.
Document 6: 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. Until 2010, he was Parliamentary Private Secretary to Secretary of State for Work and Pensions Yvette Cooper.
Document 7: Barbara Castle: Barbara Anne Castle, Baroness Castle of Blackburn, PC, GCOT (née Betts, 6 October 1910 – 3 May 2002) was a British Labour Party politician who was the Member of Parliament for Blackburn from 1945 to 1979, making her the longest-serving female MP in the history of the House of Commons, until that record was broken in 2007 by Gwyneth Dunwoody. She later became the Member of the European Parliament for Greater Manchester from 1979 to 1989. One of the most significant Labour Party politicians of the 20th century, she served in the Cabinet under Prime Minister Harold Wilson in a number of roles, including as Secretary of State for Employment, Secretary of State for Health and Social Services, and First Secretary of State.
Document 8: Rosie Winterton: Dame Rosalie Winterton, {'1': ", '2': ", '3': ", '4': "} (born 10 August 1958) is a British Labour Party politician who has been the Member of Parliament (MP) for Doncaster Central since 1997. Since June 2017 Winteron has served as Second Deputy Chairman of Ways and Means. She served under Prime Minister Gordon Brown as the Minister for Work and Pensions from 2008 to 2009, and the Minister for Local Government from 2009 to 2010. She later entered the Shadow Cabinet in May 2010 as the Shadow Leader of the House of Commons. In September 2010, she was nominated and elected unopposed as Labour Chief Whip and served until October 2016. She was elected as one of three deputy speakers of the House of Commons on 28 June 2017.
Document 9: Diane Abbott: Diane Julie Abbott (born 27 September 1953) is a British Labour Party politician who was appointed Shadow Home Secretary in October 2016. She was first elected as the Member of Parliament (MP) for Hackney North and Stoke Newington at the 1987 general election, when she became the first black woman to hold a seat in the House of Commons.
Document 10: Andrew Smith (British politician): Andrew David Smith (born 1 February 1951) is a British Labour Party politician who was the Member of Parliament (MP) for Oxford East from 1987 until 2017. He served in the Cabinet as Chief Secretary to the Treasury from 1999 to 2002 and then as Secretary of State for Work and Pensions from 2002 to 2004.
Document 11: Harriet Harman: Harriet Ruth Harman, {'1': ", '2': ", '3': ", '4': "} (born 30 July 1950) is a British solicitor and Labour Party politician who has been a Member of Parliament (MP) since 1982, first for Peckham, and then for its successor constituency of Camberwell and Peckham since 1997. She has served in various Cabinet and Shadow Cabinet positions and, in her role as Deputy Leader of the Labour Party, she was twice the Acting Leader of the Labour Party and Leader of the Opposition: from May to September 2010 and from May to September 2015. She remains the only politician to have held this position on two separate occasions.
Document 12: York Central (UK Parliament constituency): York Central is a parliamentary constituency which is represented in the House of Commons of the UK Parliament by Rachael Maskell of the Labour Party and the Co-operative Party, making it the only constituency in North Yorkshire not currently represented by the Conservatives.
Document 13: Jon Trickett: Jon Hedley Trickett (born 2 July 1950) is a British Labour politician who has been the Member of Parliament (MP) for Hemsworth in West Yorkshire since a 1996 by-election. He served as the Parliamentary Private Secretary to Prime Minister Gordon Brown from 2008 to 2010 and was promoted to the Shadow Cabinet by Ed Miliband in 2011 as Shadow Minister for the Cabinet Office.
Document 14: Clare Short: Clare Short (born 15 February 1946) is a British politician, and a member of the Labour Party. She was the Member of Parliament for Birmingham Ladywood from 1983 to 2010; for most of this period she was a Labour Party MP, but she resigned the party whip in 2006 and served the remainder of her term as an Independent. She stood down as a member of parliament at the 2010 general election. Short was Secretary of State for International Development in the government of Prime Minister Tony Blair from 3 May 1997 until her resignation from that post on 12 May 2003. Shortly before her retirement from Parliament in 2010, she was strongly rebuked by her own party when she announced her support for a hung parliament, a situation which subsequently occurred at the 2010 General Election.
Document 15: Vernon Coaker: Vernon Rodney Coaker (born 17 June 1953) is a British Labour Party politician who has been the Member of Parliament (MP) for Gedling since 1997. He also served as the Minister of State for Schools from 2009 to 2010, Shadow Secretary of State for Defence from 2013 to 2015 and Shadow Secretary of State for Northern Ireland from October 2011 to October 2013, and again from September 2015 until his resignation in June 2016 from the Shadow Cabinet.
ground_truth: Yvette Cooper