Question: Rosemary Elizabeth Cooper (born 5 September 1950) is a British Labour Party politician who has been the Member of Parliament (MP) since 2005 for which constituency that represented in the House of Commons of the UK Parliament since 2005?

Context paragraphs:
Ian Murray (British politician): Ian Murray (born 10 August 1976) is a British Labour Party politician who has represented Edinburgh South as Member of Parliament (MP) since the 2010 general election.  He served as an Edinburgh City Councillor for Liberton & Gilmerton Ward from 2003 to 2010, before his Westminster election as an Edinburgh MP.  From 2015 to 2017, Murray was the only Labour Party MP representing a Scottish constituency in the House of Commons.

West Lancashire (UK Parliament constituency): West Lancashire is a constituency represented in the House of Commons of the UK Parliament since 2005 by Rosie Cooper, a member of the Labour Party.

Leicester South (UK Parliament constituency): Leicester South is a constituency, recreated in 1974, represented in the House of Commons of the UK Parliament since 2011 by Jon Ashworth of the Labour Co-operative Party (which denotes he is a member of the Labour Party and Co-operative Party, one of 27 such current Labour MPs, and requires members to contribute practically to a cooperative business).  A previous version of the seat existed between 1918 and 1950.  Except for a 2004 by-election when it was won by the Liberal Democrats, Leicester South has been held by the Labour Party since 1987.

Wakefield (UK Parliament constituency): Wakefield is a constituency created in 1832 represented in the House of Commons of the UK Parliament since 2005 by Mary Creagh, a member of the Labour Party.

Bristol East (UK Parliament constituency): Bristol East is a constituency recreated in 1983 covering the eastern part of the City of Bristol, represented in the House of Commons of the UK Parliament since 2005 by Kerry McCarthy of the Labour Party.  An earlier guise of the seat existed between 1885 and 1950.

West Ham (UK Parliament constituency): West Ham is a constituency created in 1997 represented in the House of Commons of the UK Parliament since 2005 by Lyn Brown, a member of the Labour Party.

Rosie Cooper: Rosemary Elizabeth Cooper (born 5 September 1950) is a British Labour Party politician who has been the Member of Parliament (MP) for West Lancashire since 2005.

Mont Follick: Montefiore Follick (31 December 1887 – 10 December 1958) was a British Labour Party politician, a campaigner for spelling reform, polyglot and advocate of decimal currency.  He was Member of Parliament (MP) for Loughborough from 1945 to 1955, having previously held the post of Professor of English at the University of Madrid in Spain.  He had been adopted by the Loughborough Labour Party in 1936 as prospective parliamentary candidate but had a long wait because of the war years before being elected.  In 1949 and again in 1952 he introduced private member's bills in the UK parliament for the reform of English spelling.  He also bought the Loughborough Labour Party's current Building Unity House in 1947.

Peter Hain: Peter Gerald Hain, Baron Hain, PC (born 16 February 1950) is a British Labour Party politician, who was the Member of Parliament (MP) for Neath between 1991 and 2015, and served in the Cabinets of both Tony Blair and Gordon Brown.  He was the Leader of the House of Commons from 2003 to 2005 and Secretary of State for Northern Ireland from 2005 to 2007 under Blair, and as Secretary of State for Work and Pensions and Secretary of State for Wales from 2007 to 2008 under Brown.  In 2007, he ran for the Deputy Leadership of the Labour Party, coming fifth out of six candidates, although his failure to declare donations during this contest led to his resignation in 2008.  He later returned to the Cabinet from 2009 to 2010 as Welsh Secretary, before becoming Shadow Welsh Secretary in Ed Miliband's Shadow Cabinet from 2010 until 2012, when he announced his retirement from front-line politics.  In 2014 he announced he would stand down as the MP for Neath at the 2015 general election.  He was nominated for a life peerage in the 2015 Dissolution Honours.  Writing in the "Guardian", he subsequently outlined his views on House of Lords reform.  He came to the UK from South Africa as a teenager, and was a noted anti-apartheid campaigner in the 1970s.  He was also Honorary Vice-President of the Campaign for Homosexual Equality.  Peter Hain is on the board of African Potash, a company with a focus on building a vertically integrated platform for the mining, production and distribution of fertiliser.

Julie Cooper (politician): Julie Elizabeth Cooper (born 20 June 1960) is a British Labour Party politician, who is the Member of Parliament (MP) for Burnley.  She was elected at the 2015 General Election, defeating the sitting Liberal Democrat MP Gordon Birtwistle, with a 6.3% swing.

Supporting paragraphs: Rosie Cooper West Lancashire (UK Parliament constituency)
Answer: West Lancashire