Social Democratic Party

E42532

political party

The Social Democratic Party was a centrist, pro-European British political party formed in the early 1980s by breakaway Labour politicians advocating moderate social democracy and political reform.

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All labels observed (5)

Label	Occurrences
Social Democratic Party canonical	11
Social Democratic Party (UK)	8
Partido Social Democrata	1
Social Democratic Party (UK, 1901)	1
Social Democratic Party (UK, 1981)	1

How this entity was disambiguated

This entity first appeared as the object of triple T329243 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Social Democratic Party
Context triple: [The Lord Sainsbury of Turville, memberOfPoliticalParty, Social Democratic Party]

A. Social Democratic and Labour Party
The Social Democratic and Labour Party is a moderate Irish nationalist and social-democratic political party in Northern Ireland that has historically advocated non-violent constitutional nationalism and power-sharing during and after the Troubles.
B. Liberal Democrats
The Liberal Democrats are a centrist to centre-left political party in the United Kingdom known for advocating civil liberties, electoral reform, and pro-European policies.
C. Socialist Party of America
The Socialist Party of America was a prominent early 20th-century U.S. political party that advocated democratic socialism, labor rights, and social welfare reforms, and ran influential presidential candidates such as Eugene V. Debs and Norman Thomas.
D. Democratic Party
The Democratic Party is one of the two major contemporary political parties in the United States, traditionally associated with liberal and progressive policies on social and economic issues.
E. People's Party for Freedom and Democracy
The People's Party for Freedom and Democracy is a major Dutch liberal-conservative political party that has prominently led several governments in the Netherlands, including under Prime Minister Mark Rutte.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Social Democratic Party
Target entity description: The Social Democratic Party was a centrist, pro-European British political party formed in the early 1980s by breakaway Labour politicians advocating moderate social democracy and political reform.

A. Social Democratic and Labour Party
The Social Democratic and Labour Party is a moderate Irish nationalist and social-democratic political party in Northern Ireland that has historically advocated non-violent constitutional nationalism and power-sharing during and after the Troubles.
B. Liberal Democrats
The Liberal Democrats are a centrist to centre-left political party in the United Kingdom known for advocating civil liberties, electoral reform, and pro-European policies.
C. Socialist Party of America
The Socialist Party of America was a prominent early 20th-century U.S. political party that advocated democratic socialism, labor rights, and social welfare reforms, and ran influential presidential candidates such as Eugene V. Debs and Norman Thomas.
D. Democratic Party
The Democratic Party is one of the two major contemporary political parties in the United States, traditionally associated with liberal and progressive policies on social and economic issues.
E. People's Party for Freedom and Democracy
The People's Party for Freedom and Democracy is a major Dutch liberal-conservative political party that has prominently led several governments in the Netherlands, including under Prime Minister Mark Rutte.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	political party ⓘ
advocated	NATO membership ⓘ constitutional reform ⓘ electoral reform ⓘ mixed economy ⓘ moderate social democracy ⓘ nuclear deterrent retention ⓘ
allianceName	SDP–Liberal Alliance ⓘ
colour	red ⓘ yellow ⓘ
country	United Kingdom ⓘ
dissolved	1988 ⓘ
formedElectoralAllianceWith	Liberal Party (UK) ⓘ
founded	1981 ⓘ
foundedBy	Bill Rodgers ⓘ David Owen ⓘ Roy Jenkins ⓘ Shirley Williams ⓘ
foundingMembersCollectiveName	Gang of Four ⓘ
hadParliamentaryLeader	David Owen ⓘ
hadPresident	Roy Jenkins ⓘ
hadProminentMember	Bill Rodgers ⓘ Charles Kennedy ⓘ Paddy Ashdown ⓘ Shirley Williams ⓘ
headquartersLocation	London ⓘ linked to: London, England
ideology	centrism ⓘ social democracy ⓘ
mainSupportBase	centrist voters ⓘ moderate Labour voters ⓘ
mergedInto	Social and Liberal Democrats ⓘ linked to: Liberal Democrats
opposed	far-left influence in Labour Party (UK) ⓘ unilateral nuclear disarmament ⓘ
participatedInElection	1983 United Kingdom general election ⓘ 1987 United Kingdom general election ⓘ
politicalPositionOnEurope	pro-European ⓘ
position	centre ⓘ
reasonForFormation	desire for centrist alternative in British politics ⓘ dissatisfaction with Labour Party’s leftward shift ⓘ
shortName	SDP ⓘ
slogan	Breaking the mould of British politics ⓘ
splitFrom	Labour Party (UK) ⓘ
successor	Liberal Democrats ⓘ
supported	European Economic Community membership ⓘ European integration ⓘ
voteShareInElection	22.6% in 1987 United Kingdom general election (SDP–Liberal Alliance) ⓘ 25.4% in 1983 United Kingdom general election (SDP–Liberal Alliance) ⓘ

How these facts were elicited

Referenced by (22)

Full triples — surface form annotated when it differs from this entity's canonical label.

The Lord Sainsbury of Turville → memberOfPoliticalParty → Social Democratic Party ⓘ

Liberal Democrats → foundedBy → Social Democratic Party ⓘ

Liberal Democrats → precededBy → Social Democratic Party ⓘ

SDP–Liberal Alliance → formedFrom → Social Democratic Party (UK) ⓘ