Question: The Social Democratic Party (SDP) formed in 1988 was a political party in the United Kingdom led by David Owen which lasted for?

Context paragraphs:
Ukrainian Social Democratic Party (1899): Ukrainian Social Democratic Party (USDP) was a political party in Galicia.  The party was founded in 1899 as an autonomous section of the Polish Social Democratic Party of Galicia (and Silesia) by some members of the Polish Social Democratic Party of Galicia (PPSD) and the Ukrainian Radical Party in Lviv.  The key leaders were Mykola Hankevych (party chairman) and Semen Vityk.  It was based on the Ukrainian social democratic organization that already existed since 1897.  The first congress of the party took place in Lviv in 1903.  Few years later in 1906 the party was joined by its affiliate in Bukovina, the Social Democratic Party of Bukovina (leader Yosyp Bezpalko).

Social Democratic Party (Australia): The Social Democratic Party (SDP) was a minor centre-left Australian political party active from 1980 to 1983.  Formed in 1980, it drew inspiration from the citizen-based social democratic parties of Western Europe in Switzerland, Germany and Sweden, as distinct from trade union controlled labour parties in Britain, Australia and New Zealand.  It advocated more democracy in society such as citizen initiated referenda, workers elected onto the board of large companies to reduce strikes and overpayment of directors, and harmony between trade unions and big business.  The party unsuccessfully contested the 1983 Australian federal election and then supported the new Prime Minister, Bob Hawke, a social democrat, hoping for political reform.  The SDP was based on a booklet called "Progress Without Poverty and Conflict" by Ted Roach.

Social Democratic Party of Canada: The Social Democratic Party was a social democratic political party in Canada founded in 1911 by members of the right wing of the Socialist Party of Canada, many of whom had left the organisation in May 1907 to form the Social Democratic Party of British Columbia.  These members were dissatisfied with what they saw as that party's rigid, doctrinaire approach.  As opposed to the Socialist Party of Canada, the SDP allowed minority language groups ample room for self-determination, which led to a perception that the ethnic groups were more dominant than the overarching SDP.  When the authorities cracked down on ethnic groups during the 1918 wave of repression, many of these individual ethnic chapters were shut down.

Polish Social Democratic Party of Galicia: Polish Social Democratic Party of Galicia (Polish: "Polska Partia Socjalno-Demokratyczna Galicji" ) was a political party in Galicia.  The party was formed in 1890 as the Galician territorial organization of the Social Democratic Workers Party of Austria.  In 1892 it took the name Social Democratic Party of Galicia ("Galicyjska Partia Socjaldemokratyczna" or "Socjaldemokratyczna Partia Galicji").  After an 1899 split, which led to the formation of the Ukrainian Social Democratic Party, the word <nowiki>'</nowiki>Polish<nowiki>'</nowiki> was added to the party name.  It was also known as Polish Social Democratic Party of Galicia and Cieszyn Silesia ("Polska Partia Socjalno-Demokratyczna Galicji i Śląska Cieszyńskiego").  From 1904 it closely worked with Polish Socialist Party, into which it was merged in 1919.

Social Democratic Party (UK, 1988): The Social Democratic Party (SDP) formed in 1988 was a political party in the United Kingdom led by David Owen which lasted for only two years.  The party was formed as a result of the original Social Democratic Party, created in 1981 by the "Gang of Four" (Owen, Roy Jenkins, Bill Rodgers and Shirley Williams, all dissident Labour former ministers) voting to turn its electoral alliance with the Liberal Party into a full merger of the two parties.  The new Social and Liberal Democrats (SLD) party thus gained all of the records and assets of the original SDP.

Shirley Williams: Shirley Vivian Teresa Brittain Williams, Baroness Williams of Crosby, ("née" Catlin; born 27 July 1930) is a British politician and academic who represents the Liberal Democrats.  Originally a Labour Member of Parliament (MP) and Cabinet Minister, she was one of the "Gang of Four" rebels who founded the Social Democratic Party (SDP) in 1981.

Social Democratic Party (UK, 1990–present): The Social Democratic Party is a minor political party in the United Kingdom, established in 1990.  It traces its origin to the Social Democratic Party that was formed in 1981 by a group of dissident Labour Party Members of Parliament (MPs) and former MPs: Roy Jenkins, David Owen, Bill Rodgers and Shirley Williams, who became known as the "Gang of Four".  This party merged with the Liberal Party in 1988 to form the Liberal Democrats, but Owen, two other MPs and a minority of party activists formed a breakaway group immediately after with the same name.  That party dissolved itself in 1990, but some activists met and voted to continue the party in defiance of its National Executive, leading to the creation of a new Social Democratic Party.

Social Democratic Party (Latvia): The Social Democratic Party (Latvian: "Sociāldemokrātiskā partija" , SDP; formerly Social Democratic Union, Latvian: "Sociāldemokrātu savienība" , SDS) was a political party in Latvia formed by a splinter group from the Latvian Social Democratic Labour Party (LSDSP) after the leader of the LSDSP faction in the Saeima, Egils Baldzēns, lost to Juris Bojārs in the elections for party chairman on 27 October 2001.  The major factor in the schism was the increasing intimacy between the LSDSP and the For Human Rights in United Latvia Bloc, considered to be excessively pro-Russian by the more nationalist members in Baldzēns' breakaway wing of the party.  The newly formed SDS held its founding congress in Riga on 24 March 2002.  In the 2002 election, the party won 1.5% of the popular vote and no seats.  The last leader of the party was Egils Rutkovskis.

Socialist Party of Transylvania: The Socialist Party of Transylvania was a political party in Romania, active primarily in Transylvania.  Born out of the ethnic Romanian section of the Social Democratic Party of Hungary (MSZDP), it gradually attracted other socialist and social-democratic groups active in the Transleithanian lands of Austro-Hungary incorporated into the Kingdom of Romania after World War I.  Although initially it claimed, under the title Social Democratic Party of Transylvania and Banat, the adherence of the MSZDP party sections in Banat, the latter, while maintaining close links with the Transylvania party, constituted themselves as a distinct political organization.  The party also actively sought the cooperation of the socialist parties active in other regions of Romania, working towards a unified political party of the working class.  Such plans were however soon thwarted by repression from the part of the Romanian authorities, as well as disagreements both inside the party and among the different socialist formations of Romania.  The disagreements were further aggravated by the request of the Third International that the leaders of the party that had collaborated with the Romanian National Party be excluded from the merger, and eventually resulted in the split between the reformist social-democrats and the revolutionary-minded communists.  While the former decided to retire from unification talks and re-establish an independent Transyvanian party, the latter joined the majority of Socialist Party of Romania (PSR) to create the Communist Party of Romania in May 1921.  The social-democratic faction would late join the PSR members that disagreed with the new orientation of their party, founding the Romanian Social Democratic Party in 1927.

Social Democratic Party &quot;Harmony&quot;: The Social Democratic Party "Harmony" (Latvian: "Sociāldemokrātiskā Partija "Saskaņa"" , SDPS, Russian: Социал-демократическая партия «Согласие» ), also commonly referred to as Harmony ("Saskaņa"), is a social-democratic political party in Latvia.  It is the major catch-all party of the centre-left in Latvian politics.  The party was founded in 2010 as the merger of the National Harmony Party (TSP) with New Centre (JC) and the Social Democratic Party (SDP), a breakaway from the Latvian Social Democratic Workers' Party (LSDSP).  At that time, all three were members of the former electoral alliance Harmony Centre.  The alliance also included the communist Socialist Party of Latvia.  The Daugavpils City Party merged into the party in 2011.

Supporting paragraphs: Social Democratic Party (UK, 1988) Shirley Williams
Answer: only two years