Question: When was the Prime Minister of Australia born who defeated Abbott in 14 September 2015?

full_context: Document 1: Gorton Government: The Gorton Government refers to the federal Executive Government of Australia led by Prime Minister John Gorton. It was made up of members of a Liberal Party of Australia-Country Party of Australia coalition in the Australian Parliament from January 1968 to March 1971.
Document 2: Barnaby Joyce: Barnaby Thomas Gerard Joyce (born 17 April 1967) is an Australian politician who has served as the Deputy Prime Minister of Australia since 18 February 2016, as the Leader of the National Party of Australia since 11 February 2016, and as the Minister for Agriculture and Water Resources since 21 September 2015. He was sworn in as Minister for Agriculture in the Abbott Government on 18 September 2013. Water Resources was added to his portfolio on 21 September 2015 in the Turnbull Government.
Document 3: Abbott Government: The Abbott Government was the federal executive government of Australia led by Prime Minister Tony Abbott. The Government was made up of members of the Liberal–National Coalition. The Leader of the Nationals, Warren Truss, served as Deputy Prime Minister. Following the 2013 Australian federal election on 7 September, the Coalition defeated the second Rudd Government, ending six years of Labor Government. The Abbott Government was sworn into office on 18 September 2013. Less than two years later on 14 September 2015, Malcolm Turnbull defeated Abbott in a leadership ballot, 54 votes to 44.
Document 4: Australian federal election, 2013: A federal election to determine the members of the 44th Parliament of Australia took place on 7 September 2013. The centre-right Liberal/National Coalition opposition led by then-Opposition leader Tony Abbott of the Liberal Party of Australia and Coalition partner the National Party of Australia, led by Warren Truss, defeated the incumbent centre-left Labor Party government of Prime Minister Kevin Rudd by a 17-seat 3.6 percentage point two-party swing. Labor had been in government since the 2007 election. Abbott was sworn in by the Governor-General, Quentin Bryce as Australia's 28th Prime Minister on 18 September 2013 along with the Abbott Ministry and the members of the House of Representatives. The 44th Parliament of Australia opened on 12 November 2013, which is taken to be the commencement of the term of members of the House of Representatives. The new senators were sworn in by the next Governor-General Peter Cosgrove on 7 July 2014, with their six-year terms commencing on 1 July.
Document 5: Malcolm Turnbull: Malcolm Bligh Turnbull (born 24 October 1954) is the 29th and current Prime Minister of Australia. He first served as parliamentary leader of the Liberal Party and as opposition leader from 2008 to 2009, and became parliamentary leader and Prime Minister after defeating Tony Abbott at the 2015 Liberal leadership spill. The Turnbull Government was re-elected at the 2016 federal election, but with only a one-seat majority.
Document 6: Tony Abbott: Anthony John Abbott (born 4 November 1957) is an Australian politician who was the 28th Prime Minister of Australia, from 18 September 2013 to 15 September 2015. Abbott was leader of the Liberal Party of Australia from 2009 to 2015, and has been a member of parliament for Warringah since 1994.
Document 7: Second Rudd Ministry: The Second Rudd Ministry (Labor) was the 68th ministry of the Australian government, led by Prime Minister Kevin Rudd. It succeeded the second Gillard ministry after a leadership spill within the Australian Labor Party that took place on 26 June 2013. Three members of the ministry were sworn in by Governor-General Quentin Bryce on 27 June 2013. These were Kevin Rudd, Prime Minister; Anthony Albanese, Deputy Prime Minister; and Chris Bowen, Treasurer. The remainder of the ministry were sworn in on 1 July 2013.
Document 8: Napthine Ministry: The Napthine Ministry was the 68th ministry of the Government of Victoria. It was a Liberal–National Coalition Government, led by the Premier of Victoria, Denis Napthine, and Deputy Premier, Peter Ryan. It succeeded the Baillieu Ministry on 6 March 2013, following the resignation of Ted Baillieu from the Liberal Party leadership, and the election of Denis Napthine as Liberal Party leader and Premier. The Napthine Ministry consisted of 22 Ministers, most of which held multiple portfolios.
Document 9: Australian Labor Party leadership spill, 2010: The Australian Labor Party leadership spill, 2010 occurred on 24 June 2010. Kevin Rudd, the Prime Minister of Australia, was challenged by Julia Gillard, the Deputy Prime Minister of Australia, for the leadership of the Australian Labor Party. Gillard won the election unopposed after Rudd declined to contest, choosing instead to resign. Gillard was duly sworn in as Prime Minister by Quentin Bryce, the Governor-General, on 24 June 2010 at Government House, becoming Australia's first female Prime Minister.
Document 10: First Turnbull Ministry: The First Turnbull Ministry (Liberal–National Coalition) was the 70th ministry of the Government of Australia, led by Prime Minister Malcolm Turnbull. It succeeded the Abbott Ministry after a leadership spill that took place on 14 September 2015 ended Prime Minister Tony Abbott's leadership of the Liberal Party of Australia. On 15 September, the National Party confirmed, after successful negotiations, that it would continue a coalition agreement with the Liberal Party, guaranteeing the Turnbull Government a majority in the Australian House of Representatives.
Document 11: Anthony Albanese: Anthony Norman Albanese ( ; born 2 March 1963) is an Australian politician who represents the Division of Grayndler for the Australian Labor Party as well as being the party's spokesperson on Infrastructure, Transport and Tourism. Previously he served as Deputy Prime Minister of Australia, Minister for Infrastructure and Transport, the Minister for Broadband, Communications and the Digital Economy and the Leader of the House of Representatives. He has been a member of the Australian House of Representatives since 1996.
Document 12: Scott Morrison: Scott John Morrison (born 13 May 1968) is an Australian politician. He has been a Liberal Party member of the Australian House of Representatives representing the Division of Cook in New South Wales since the 2007 federal election. After the Liberal Party was elected to government at the 2013 federal election, Morrison was appointed the Minister for Immigration and Border Protection, responsible for implementing Operation Sovereign Borders, aimed at preventing people smuggling. In late 2014 he was appointed Minister for Social Services after a cabinet reshuffle. He became the Treasurer of Australia in the First Turnbull Ministry.
Document 13: Fraser Government: The Fraser Government refers to the federal Executive Government of Australia led by Prime Minister Malcolm Fraser. It was made up of members of a Liberal Party of Australia-Country Party of Australia coalition in the Australian Parliament from November 1975 to March 1983. Initially appointed as a "caretaker" government following the Dismissal of the Whitlam Government, Fraser won in a landslide at the resulting 1975 Australian Federal Election, and won substantial majorities at the subsequent 1977 and 1980 elections, before losing to the Bob Hawke led Australian Labor Party in the 1983 election.
Document 14: Turnbull Government: The Turnbull Government is the federal executive government of Australia, led by the 29th Prime Minister of Australia, Malcolm Turnbull. The government is made of members of the Liberal-National Coalition. The prime ministership of Malcolm Turnbull commenced on 15 September 2015, when he was sworn in by the Governor-General of Australia. The Turnbull Government succeeded the Abbott Government, which was elected at the 2013 federal election. Turnbull took office by challenging the incumbent Liberal leader Tony Abbott in an internal leadership ballot. Warren Truss, the leader of the Nationals continued as Deputy Prime Minister, until he retired in 2016 and was replaced by Barnaby Joyce.
Document 15: Menzies Government (1949–66): The Menzies Government (1949–1966) refers to the period of federal Executive Government of Australia led by Prime Minister Robert Menzies. It was made up of members of a Liberal Party of Australia-Country Party of Australia coalition in the Australian Parliament from 1949–1966. Menzies led the Liberal-Country Coalition to election victories in 1949, 1951, 1954, 1955, 1958, 1961 and 1963. Robert Menzies was Australia's longest serving Prime Minister. He had served a previous term as Prime Minister as leader of the United Australia Party from 1939–1941.
ground_truth: 24 October 1954