Question: What political party Alec Douglas-Home and Antony Lambton serve?
Context: The 1965 Conservative Party leadership election was held in July 1965 to find a successor to Sir Alec Douglas-Home. Keith Sinjohn Joseph, Baron Joseph, (17 January 1918 – 10 December 1994), known as Sir Keith Joseph, 2nd Baronet, for most of his political life, was a British barrister and politician.  A member of the Conservative Party, he served in the Cabinet under four prime ministers: Harold Macmillan, Sir Alec Douglas-Home, Edward Heath and Margaret Thatcher.  He was a key influence in the creation of what came to be known as "Thatcherism" and the subsequent decline of one-nation conservatism and the postwar consensus. The Sindh Mohajir Punjabi Pathan Muttahida Mahaz ('Sindh Mohajir-Pashtun-Punjab United Front', abbreviated MPPM) was a political party in the Pakistani province Sindh.  The party was founded in 1969.  Nawab Muzaffar Khan was the convenor of MPPM.  In theory the party sought to serve as a political platform for Muhajirs, Pashtuns and Punjabis in Sindh (i.e. populations that had migrated to Sindh after the birth of Pakistan), but in reality it functioned as a Muhajir political party as the Pashtun and Punjabi presence in the MPPM ranks was very limited.  The party mobilized Urdu-speaking Muhajirs against the emerging Sindhi nationalist movement.  It was led by Muhajir bureaucrats and businessmen.  The main base of the MPPM was the city of Hyderabad. Alexander Frederick Douglas-Home, Baron Home of the Hirsel, ( ; 2 July 1903 – 9 October 1995) was a British statesman of the Conservative Party who served as Prime Minister from October 1963 to October 1964.  He is notable for being the last Prime Minister to hold office while being a member of the House of Lords, before renouncing his peerage and taking up a seat in the House of Commons for the remainder of his premiership.  His reputation, however, rests more on his two spells as Britain's foreign secretary than on his brief premiership. The Unconditional Spanish Party (Spanish: "Partido Incondicional Español" ) was a loyalist conservative political party in Puerto Rico.  It was founded on November 1870 as the Liberal-Conservative Party but in 1873 it changed its name to Unconditional Spanish Party.  The party favored traditionalist assimilation into the political party system of Spain.  It purchased the newspaper "Boletín Mercantil" to serve as the party's official organ for disseminating its conservative views.  Most of its members belonged to the Puerto Rican Volunteers Corps. This is a list of life peerages in the Peerage of the United Kingdom created under the Life Peerages Act 1958 from the time the Act came into effect to 1979, grouped by prime minister.  During this period there were five prime ministers: three Conservatives, Harold Macmillan, Alec Douglas-Home, and Edward Heath, and two from the Labour Party, Harold Wilson (who served twice) and James Callaghan. John Frederick Lambton, 5th Earl of Durham (7 October 1884 – 4 February 1970), briefly styled Viscount Lambton between 1928 and 1929, was a British peer.  Through his sister Lilian, he was an uncle of future Prime Minister Sir Alec Douglas-Home.  Lord Durham is best remembered for the donation of Penshaw Monument to the National Trust. First Among Equals is a 1984 novel by British author Jeffrey Archer, which follows the careers and personal lives of four fictional British politicians (Simon Kerslake, MP for Coventry Central and later Pucklebridge; Charles Seymour, MP for Sussex Downs; Raymond Gould, MP for Leeds North; and Andrew Fraser, MP for Edinburgh Carlton) from 1964 to 1991, with each vying to become Prime Minister.  Several situations in the novel are drawn from the author's own early political career in the British House of Commons, and the fictional characters interact with actual political figures from the UK and elsewhere including Winston Churchill, Alec Douglas-Home, Harold Wilson, Edward Heath, Margaret Thatcher, Douglas Hurd, Colonel Gadaffi, Gary Hart and Queen Elizabeth II. The First Shadow Cabinet of Edward Heath was created on 28 July 1965 after the Conservative Party elected Edward Heath as its leader, replacing Sir Alec Douglas-Home. Antony Claud Frederick Lambton, (10 July 1922 – 30 December 2006), briefly 6th Earl of Durham, styled before 1970 as Viscount Lambton, and widely known as "Lord Lambton", was a Conservative Member of Parliament and a cousin of Sir Alec Douglas-Home, the former Prime Minister and Foreign Secretary.  Lambton resigned from Parliament and ministerial office in 1973.
Answer: Conservative Party