Question: In what political party was the man who officially opened he Royal Spa Centre in 1972?

full_context: Document 1: Royal Panopticon: The Royal Panopticon of Science and Art, to give the full title, was one of the grand social institutions and architectural splendours of Victorian London, that is now lost. It was given a Royal Charter in 1850 and in July 1851 a lease was taken out on a premium site for 60 years, and building could commence. The Panopticon was built on the eastern side of Leicester Square, opening on 18 March 1854. As a showcase venue for the very best achievements in Science and Arts of the time, it attracted 1,000 visitors per day. Two years later however it closed, obtained a licence for theatrical performances and was re-opened as the Alhambra Theatre. The site is now occupied by the Odeon Leicester Square.
Document 2: Anthony Eden: Robert Anthony Eden, 1st Earl of Avon, (12 June 1897 – 14 January 1977) was a British Conservative politician who served three periods as Foreign Secretary and then a relatively brief term as Prime Minister of the United Kingdom from 1955 to 1957.
Document 3: Gordon Craig Theatre: The Gordon Craig Theatre is the only theatre in Stevenage, Hertfordshire. The theatre is housed in the Stevenage Arts & Leisure Centre, which is situated on Lytton Way, directly opposite the Railway Station and is connected to the station by a bridge extending across the dual carriageway. The Arts & Leisure Centre is accessible by train (via the bridge), car (via Lytton Way), bus (via Stevenage Bus Station) and foot (via the Town Centre). The theatre was officially opened in 1976 by HRH Prince Philip, Duke of Edinburgh.
Document 4: Anthony Eden hat: An "Anthony Eden" hat, or simply an "Anthony Eden", was a silk-brimmed, black felt Homburg of the kind favoured in the 1930s by Anthony Eden, later 1st Earl of Avon (1897–1977). Eden was a Cabinet Minister in the British National Government, holding the offices of Lord Privy Seal from 1934–1935 and Foreign Secretary 1935 to 1938. He was later Dominions Secretary from 1939–1940, War Secretary in 1940, Foreign Secretary from 1940–1945 and 1951–1955, and Prime Minister 1955 to 1957.
Document 5: Stanley Baldwin: Stanley Baldwin, 1st Earl Baldwin of Bewdley, (3 August 186714 December 1947) was a British Conservative politician who dominated the government in his country between the two world wars. Three times Prime Minister, he is the only premier to have served under three monarchs (George V, Edward VIII and George VI).
Document 6: Royal Pump Rooms: The Royal Pump Rooms (signed Royal Pump Room and Baths) is a Grade II listed building on the Parade in Leamington Spa, Warwickshire, England. It was the most famous of several spa baths opened in Leamington between the late-18th and mid-19th centuries. People would travel from throughout the country, and indeed Europe, to benefit from treatments using the town's healing waters. When 'taking the waters' became less fashionable after the mid-19th century the Pump Rooms became Leamington's only surviving spa facility, later also being extended to include the town's public swimming pool. After a major redevelopment in 1997-99 the building now houses "Leamington Spa Art Gallery & Museum", a public library, a Tourist Information Centre, cafe and assembly rooms.
Document 7: Neville Chamberlain: Arthur Neville Chamberlain, ( ; 18 March 1869 – 9 November 1940) was a British Conservative politician who served as Prime Minister of the United Kingdom from May 1937 to May 1940. Chamberlain is best known for his appeasement foreign policy, and in particular for his signing of the Munich Agreement in 1938, conceding the German-speaking Sudetenland region of Czechoslovakia to Germany. However, when Adolf Hitler later invaded Poland, the UK declared war on Germany on 3 September 1939, and Chamberlain led Britain through the first eight months of World War II.
Document 8: Conservative government, 1957–1964: The Conservative government of the United Kingdom that began in 1957 and ended in 1964 consisted of three ministries: the first Macmillan ministry, second Macmillan ministry, and then the Douglas-Home ministry. They were led by Harold Macmillan and Sir Alec Douglas-Home, who were appointed respectively by Queen Elizabeth II.
Document 9: Theatre Royal Haymarket: The Theatre Royal Haymarket (also known as Haymarket Theatre or the Little Theatre) is a West End theatre in the Haymarket in the City of Westminster which dates back to 1720, making it the third-oldest London playhouse still in use. Samuel Foote acquired the lease in 1747, and in 1766 he gained a royal patent to play legitimate drama (meaning spoken drama, as opposed to opera, concerts or plays with music) in the summer months. The original building was a little further north in the same street. It has been at its current location since 1821, when it was redesigned by John Nash. It is a Grade I listed building, with a seating capacity of 888. The freehold of the theatre is owned by the Crown Estate.
Document 10: Former Queen’s Theater, Singapore: The Former Queen’s Theater is located at the Geylang Road, opposite Lorong 41 road. The theater had been one of the main entertainment places in Geylang from 1930 to 1982. The building was named Wembley Cinema from 1930 to 1933, Ritz Cinema from 1933 to 1939, and Queen’s Theater from 1939 until it was closed in 1982. The front facade of the building is now conserved and becomes part of the GrandLink Square.
Document 11: Royal Centre tram stop: Royal Centre is a tram stop of Nottingham Express Transit (NET) in the centre of the city of Nottingham. It derives its name from the adjacent Theatre Royal and the Royal Concert Hall. The stop is also close to the Cornerhouse, the Victoria Centre and the Newton Building of Nottingham Trent University, although much of the university's City Campus is closer to the Nottingham Trent University stop.
Document 12: Winston Churchill: Sir Winston Leonard Spencer-Churchill, {'1': ", '2': ", '3': ", '4': "} (30 November 187424 January 1965) was a British statesman, army officer, and writer. He served as Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955. As a Member of Parliament (MP), he represented five constituencies over the course of his career. As Prime Minister, Churchill led Britain to victory during World War II. He led the Conservative Party for fifteen years from 1940 to 1955.
Document 13: Clarissa Eden: Anne Clarissa Eden, Dowager Countess of Avon ("née" Spencer-Churchill; born 28 June 1920) is the widow of Anthony Eden, 1st Earl of Avon (1897–1977), who was British Prime Minister from 1955 to 1957. She married Eden in 1952, becoming Lady Eden in 1954 when he was made a Knight of the Garter, and then becoming Countess of Avon in 1961 on her husband's elevation to the peerage. She is also the niece of the prime minister Winston Churchill. Her memoir, sub-titled "From Churchill to Eden", was published in 2007 under the name of Clarissa Eden.
Document 14: Harold Macmillan: Maurice Harold Macmillan, 1st Earl of Stockton, {'1': ", '2': ", '3': ", '4': "} (10 February 1894 – 29 December 1986) was a British statesman of the Conservative Party who served as Prime Minister of the United Kingdom from 1957 to 1963. Nicknamed "Supermac", he was known for his pragmatism, wit and unflappability.
Document 15: Royal Spa Centre: The Royal Spa Centre is a Theatre in Leamington Spa, England. The Centre was officially opened on 15 June 1972 by Anthony Eden, one time MP for Leamington and Warwick and Prime Minister of the UK. It was designed by the Architect Sir Frederick Gibberd and has two Auditoria, the first of which is a traditional Theatre which can hold 667 people. The second is a Cinema/Studio Theatre which holds up to 188, which shows films or used as a small theatre space.
ground_truth: Conservative