Question: What year was the Labour Party politician representing Warrington South Mayor of Warrington?

Context paragraphs:
Helen Southworth: Helen Mary Southworth (born 13 November 1956) is a Labour Party politician in the United Kingdom.  She is the former Member of Parliament (MP) for Warrington South, and was first elected at the 1997 general election.  She retained the Warrington South seat at the 2001 and 2005 general elections, each time with a reduced majority.  On 15 June 2009, she announced that she would be retiring at the next general election.  The seat that she vacated was subsequently won for the Conservative Party by David Mowat.  She was the only person to have won successive elections in the constituency until her successor, Conservative David Mowat, won the 2015 General Election with an increased majority.

Hanne Bjurstrøm: Hanne Bjurstrøm (born 20 September 1960) is a Norwegian lawyer and politician representing the Norwegian Labour Party, who is currently serving as Gender Equality and Anti-Discrimination Ombud (since 2016).  She served as Minister of Labour and Social Inclusion in the Stoltenberg's Second Cabinet from 21 December 2009 to 21 September 2012.

David Mowat: David John Mowat (born 20 February 1957) is a former Conservative Party politician in the United Kingdom.  He was the Member of Parliament (MP) for Warrington South, and was first elected at the 2010 general election.  He was appointed as Parliamentary Under Secretary of State at the Department of Health in July 2016.  He failed to get re-elected at the United Kingdom general election, 2017.

Martin O'Sullivan: Martin O'Sullivan (died 20 January 1956) was an Irish Labour Party politician.  A railway official, he was elected to Dáil Éireann as a Labour Party Teachta Dála (TD) for the Dublin North-West constituency at the 1943 general election.  He was re-elected at the 1944 and 1948 general elections.  He lost his seat at the 1951 general election.  He served as Lord Mayor of Dublin from 1943 to 1945.  He was the first Labour Party Lord Mayor.

Warrington South (UK Parliament constituency): Warrington South is a constituency represented in the House of Commons of the UK Parliament since 2017 by Faisal Rashid, a Labour Party politician.

Anthony Crosland: Charles Anthony Raven Crosland (29 August 1918 – 19 February 1977), otherwise Tony Crosland or C.A.R. Crosland, was a British Labour Party politician and author.  He served as Member of Parliament for South Gloucestershire and later for Great Grimsby.  Throughout his long career he occupied the cabinet positions of Secretary of State for Education and Science, President of the Board of Trade, Secretary of State for Local Government and Regional Planning and Foreign Secretary.  A prominent socialist intellectual, he became one of the Labour Party's revisionists on the right, as an intellectual leader of Gaitskellism.  His highly influential book "The Future of Socialism" (1956) argued against many Marxist notions and Labour Party orthodoxy that public ownership was essential to make socialism work.  He offered positive alternatives to both right and left wings of his Labour Party.  He questioned the need for public ownership of the means of production – the classic socialist formulation – and argued instead for making the highest priority the end of poverty and improved public services.  He led the Labour battle to replace grammar schools with comprehensive schools that did not sort students at age 11.  As foreign secretary he promoted détente with the Soviet Union.

Faisal Rashid: Mian Faisal Rashid is a British Labour Party politician.  He is the Member of Parliament (MP) for Warrington South, and was first elected at the 2017 general election.  He was the Mayor of Warrington in 2016.

Rune Øygard: Rune Øygard (born 27 April 1959) is a former Norwegian politician representing the Norwegian Labour Party, who served as mayor of Vågå from 1995 to 2012 when he was granted leave following his indictment for child sexual abuse in a much publicized case, the so-called Vågå case.  On 17 December 2012, he was found guilty of child sexual abuse, including sexual intercourse with a 13-year-old girl, and sentenced to 4 years imprisonment.  The same day, he resigned as mayor.

Clement Attlee: Clement Richard Attlee, 1st Earl Attlee, {'1': ", '2': ", '3': ", '4': "} (3 January 1883 – 8 October 1967) was a British Labour politician who served as Prime Minister of the United Kingdom from 1945 to 1951 and Leader of the Labour Party from 1935 to 1955.  In 1940, Attlee took Labour into the wartime coalition government and served under Winston Churchill, becoming the first person to hold the office of Deputy Prime Minister of the United Kingdom.  He went on to lead the Labour Party to an unexpected landslide victory at the 1945 general election; forming the first Labour majority government, and a mandate to implement its postwar reforms.  The 12.0% national swing from the Conservatives to Labour was unprecedented at that time and remains the largest ever achieved by any party at a general election in British electoral history.  He was re-elected with a narrow majority at the 1950 general election.  In the following year, Attlee called a snap general election, hoping to increase his parliamentary majority.  However, he was narrowly defeated by the Conservatives under the leadership of Winston Churchill; despite winning the most votes of any political party in any general election in British political history until the Conservative Party's fourth consecutive victory in 1992.  Attlee remains the longest-ever serving Leader of the Labour Party.

Jenny Marra: Jennifer Margaret "Jenny" Marra (born 6 November 1977) is a Scottish Labour Party politician representing the North East Scotland electoral region in the Scottish Parliament since 2011.

Supporting paragraphs: Warrington South (UK Parliament constituency) Faisal Rashid
Answer: 2016