paragraph_text: Bahrain's prime minister, Sheikh Khalifah bin Sulman Al Khalifah has been in the post since 1970, making him the longest serving non-elected prime minister.

paragraph_text: The Liberal government of Australia, led by Prime Minister Robert Menzies, immediately responded to the UN resolution by offering military assistance. 17,000 Australians served in the Korean War between 1950 and 1953, and they suffered 339 dead, and 1200 wounded.

paragraph_text: The Prime Minister of Jamaica is Jamaica's head of government, currently Andrew Holness. Holness, as leader of the governing Jamaica Labour Party (JLP), was sworn in as Prime Minister on 3 March 2016, succeeding People's National Party (PNP) leader Portia Simpson - Miller. This was a result of the JLP's victory in Jamaica's 25 February 2016 general election.

paragraph_text: Erna Solberg (; born 24 February 1961) is a Norwegian politician serving as Prime Minister of Norway since 2013 and Leader of the Conservative Party since May 2004.

paragraph_text: The First Rutte cabinet, also called the Rutte–Verhagen cabinet was the cabinet of the Netherlands from 14 October 2010 until 5 November 2012. The cabinet was formed by the political parties People's Party for Freedom and Democracy (VVD) and the Christian Democratic Appeal (CDA) after the election of 2010. The right-wing cabinet was a minority government in the House of Representatives but was supported by the Party for Freedom (PVV) for a majority. It was the first of three cabinets of Mark Rutte, the Leader of the People's Party for Freedom and Democracy as Prime Minister, with Maxime Verhagen the Leader of the Christian Democratic Appeal serving as Deputy Prime Minister.

paragraph_text: Sigmar Hartmut Gabriel (born 12 September 1959) is a German politician who was Minister for Foreign Affairs from 2017 to 2018 and Vice-Chancellor of Germany from 2013 to 2018. He was Leader of the Social Democratic Party of Germany (SPD) from 2009 to 2017, which made him the party's longest-serving leader since Willy Brandt. He was the Federal Minister of the Environment from 2005 to 2009 and the Federal Minister for Economic Affairs and Energy from 2013 to 2017. From 1999 to 2003 Gabriel was Prime Minister of Lower Saxony.

paragraph_text: Since the elections of 1929, there have been three general elections that resulted in hung parliaments in the UK.  The first was the election in February 1974, and the ensuing parliament lasted only until October. The second was the May 2010 election, the result of which was a hung parliament with the Conservative party as the largest single party. The results for the 3 main parties were: Conservatives 306, Labour 258, Liberal Democrats 57. The third one resulted from the snap election held in June 2017 that had been called for by Theresa May in order to strengthen her majority heading into Brexit negotiations later in 2017. However, this election backfired on May and her Conservative Party, resulting in a hung parliament after the snap election.The formation of the coalition resulting from the 2010 election led to the Fixed-term Parliaments Act 2011, which instituted fixed five-year Parliaments and transferred the power to call early elections from the Prime Minister to Parliament itself. This was the idea of the Deputy Prime Minister Nick Clegg, then the leader of the Liberal Democrats, who said that this would stop the Prime Minister and leader of the Conservative Party, David Cameron, from calling a snap election to end the hung parliament, as many other Conservatives had requested.

paragraph_text: Politically, Robert Menzies and the Liberal Party of Australia dominated much of the immediate post war era, defeating the Labor government of Ben Chifley in 1949, in part over a Labor proposal to nationalise banks and following a crippling coal strike led by the Australian Communist Party. Menzies became the country's longest-serving Prime Minister and the Liberal party, in coalition with the rural based Country Party, won every federal election until 1972.

paragraph_text: Petre S. Aurelian (13 December 1833 – 24 January 1909) was a Romanian politician. A member of the National Liberal Party, he served as a Prime Minister of Romania between 2 December 1896 and 12 April 1897.

paragraph_text: The Australia Day Protests of 2012 began with a commemoration at the Aboriginal Tent Embassy in Canberra to mark its 40th Anniversary and culminated in a security scare which saw the Prime Minister and Opposition Leader of Australia escorted from a nearby Canberra venue amidst rowdy protesters. The protesters had been advised of the leaders' whereabouts and misinformed of a statement by the opposition leader in relation to the Tent Embassy by a union official who had received information about Abbott's statement and whereabouts from the prime minister's office.

paragraph_text: The contemporary Liberal Party generally advocates economic liberalism (see New Right). Historically, the party has supported a higher degree of economic protectionism and interventionism than it has in recent decades. However, from its foundation the party has identified itself as anti-socialist. Strong opposition to socialism and communism in Australia and abroad was one of its founding principles. The party's founder and longest-serving leader Robert Menzies envisaged that Australia's middle class would form its main constituency.

paragraph_text: Estonia is a parliamentary representative democratic republic in which the Prime Minister of Estonia is the head of government and which includes a multi-party system. The political culture is stable in Estonia, where power is held between two and three parties that have been in politics for a long time. This situation is similar to other countries in Northern Europe. The former Prime Minister of Estonia, Andrus Ansip, is also Europe's longest-serving Prime Minister (from 2005 until 2014). The current Estonian Prime Minister is Taavi Rõivas, who is the former Minister of Social Affairs and the head of the Estonian Reform Party.

paragraph_text: Born in Ameliasburg, Ontario, he was first elected to the House of Commons of Canada as a Liberal Member of Parliament representing the rural Ontario riding of Prince Edward—Hastings in 1988. He was considered a strong supporter of Prime Minister Jean Chrétien, and was removed from the Canadian Cabinet when Paul Martin succeeded Chrétien as Liberal leader and prime minister in 2003.

paragraph_text: Francis Michael Forde (18 July 1890 -- 28 January 1983) was an Australian politician who served as Prime Minister of Australia from 6 to 13 July 1945. He held office after the death of John Curtin, and is the shortest - serving prime minister in Australia's history.

paragraph_text: Jean Pelletier, (; February 21, 1935 – January 10, 2009) was a Canadian politician who served as the 37th mayor of Quebec City, Chief of Staff in the Prime Minister's Office, and chairman of Via Rail. He was a leading organizer of the Liberal Party of Canada.

paragraph_text: From 2004 to 2014, the Congress - led United Progressive Alliance, a coalition of several regional parties, formed the Indian government, and was headed by Prime Minister Manmohan Singh. The leader of the party during the period, Sonia Gandhi has served the longest term as the president of the party. As of March 2018, the party is in power in three states: Punjab, Karnataka and Mizoram and the union territory of Puducherry.

paragraph_text: David Lloyd George, 1st Earl Lloyd-George of Dwyfor, (17 January 1863 – 26 March 1945) was a British statesman and Liberal Party politician. He was the last Liberal to serve as Prime Minister of the United Kingdom.

paragraph_text: The UAP had been formed as a new conservative alliance in 1931, with Labor defector Joseph Lyons as its leader. The stance of Lyons and other Labor rebels against the more radical proposals of the Labor movement to deal the Great Depression had attracted the support of prominent Australian conservatives. With Australia still suffering the effects of the Great Depression, the newly formed party won a landslide victory at the 1931 Election, and the Lyons Government went on to win three consecutive elections. It largely avoided Keynesian pump-priming and pursued a more conservative fiscal policy of debt reduction and balanced budgets as a means of stewarding Australia out of the Depression. Lyons' death in 1939 saw Robert Menzies assume the Prime Ministership on the eve of war. Menzies served as Prime Minister from 1939 to 1941 but resigned as leader of the minority World War II government amidst an unworkable parliamentary majority. The UAP, led by Billy Hughes, disintegrated after suffering a heavy defeat in the 1943 election.

paragraph_text: The Prime Minister of New Zealand (Māori: Te Pirimia o Aotearoa) is the head of government of New Zealand. The incumbent Prime Minister, Jacinda Ardern, leader of the New Zealand Labour Party, took office on 26 October 2017.

paragraph_text: Anthony Charles Lynton Blair (born 6 May 1953) is a British politician who served as Prime Minister of the United Kingdom from 1997 to 2007 and Leader of the Labour Party from 1994 to 2007. He is the most recent British Labour Party leader to have won a general election.

Question: What event caused the Liberal Party of Australia's longest-serving leader to become Prime Minister?
Answer: Lyons' death in 1939