Question: When did the country where Robin Tampoe was born leave the British Empire?

full_context: Document 1: Tjalie Robinson: Tjalie Robinson is the main alias of the Indo (Eurasian) intellectual and writer Jan Boon (born Nijmegen, 10 January 1911; died The Hague, 22 April 1974) also known as Vincent Mahieu. His father Cornelis Boon, a Royal Netherlands East Indies Army (KNIL) sergeant, was Dutch and his Indo-European mother Fela Robinson was part Scottish and Javanese.
Document 2: Dominion of Ceylon: Between 1948 and 1972, Ceylon was an independent country in the Commonwealth of Nations that shared a monarch with Australia, Canada, New Zealand and the United Kingdom, and certain other sovereign states. In 1948, the British Colony of Ceylon was granted independence as Ceylon. In 1972, the country became a republic within the Commonwealth, and its name was changed to Sri Lanka. It was an island country in South Asia, located about 31 kilometres (19.3 mi) off the southern coast of India.
Document 3: British Empire: Britain's remaining colonies in Africa, except for self-governing Southern Rhodesia, were all granted independence by 1968. British withdrawal from the southern and eastern parts of Africa was not a peaceful process. Kenyan independence was preceded by the eight-year Mau Mau Uprising. In Rhodesia, the 1965 Unilateral Declaration of Independence by the white minority resulted in a civil war that lasted until the Lancaster House Agreement of 1979, which set the terms for recognised independence in 1980, as the new nation of Zimbabwe.
Document 4: Mrinal Sen: After making five more films, he made a film with a shoestring budget provided by the Government of India. This film, Bhuvan Shome (Mr. Shome, 1969), finally launched him as a major filmmaker, both nationally and internationally. Bhuvan Shome also initiated the "New Cinema" film movement in India.
Document 5: George VI: George VI's reign saw the acceleration of the dissolution of the British Empire. The Statute of Westminster 1931 had already acknowledged the evolution of the Dominions into separate sovereign states. The process of transformation from an empire to a voluntary association of independent states, known as the Commonwealth, gathered pace after the Second World War. During the ministry of Clement Attlee, British India became the two independent dominions of India and Pakistan in 1947. George relinquished the title of Emperor of India, and became King of India and King of Pakistan instead. In 1950 he ceased to be King of India when it became a republic within the Commonwealth of Nations, but he remained King of Pakistan until his death and India recognised his new title of Head of the Commonwealth. Other countries left the Commonwealth, such as Burma in January 1948, Palestine (divided between Israel and the Arab states) in May 1948 and the Republic of Ireland in 1949.
Document 6: Robin Tampoe: Robin Tampoe (29 December 1930 – 22 March 2000) was a pioneering film maker from Sri Lanka. He hailed from the Sri Lankan Tamil community but most of his movies were made in the Sinhala language. He is the son of another pioneering filmmaker, W.M.S Tampoe.
Document 7: Second Sirimavo Bandaranaike cabinet: The Second Sirimavo Bandaranaike cabinet was the central government of Ceylon led by Prime Minister Sirimavo Bandaranaike between 1970 and 1977. It was formed in May 1970 after the parliamentary election and it ended in July 1977 after the opposition's victory in the parliamentary election. The second Sirimavo Bandaranaike cabinet saw Ceylon severing the last colonial ties with Britain as the country became a parliamentary republic in May 1972. The country was also renamed Sri Lanka.
Document 8: Tan Poi Sin: Tan Poi Sin () is a TV drama and documentary director-producer from Malaysia. Established as a documentary director, she started out as a screenwriter, and was a producer-director in Astro. Her meritorious efforts in historical research landed her the role of Assistant Director in Astro AEC's remarkable documentary Malaysia, My Home! (2005). Her directorial work included Journey with Jason, Taste with Jason and Hai Zi. She produced, directed & wrote the script for New Village Stories (2009), which broke the rating record of locally produced Chinese content show on paid TV, and received tremendous response from the Chinese community.
Document 9: S. Mahinda: S. Mahinda arrived in Ceylon (now Sri Lanka) at a young age and was ordained as a Buddhist monk. Having learned the Sinhala language, he became a poet, creating several literary works inspiring patriotism among the Sinhalese and urging them to fight for their freedom during Sri Lankan Independence movement.. He is now considered a national hero of Sri Lanka and one among the greatest of Sinhalese poetry figures of all time.
Document 10: Samoa: Director Sima Urale is an award-winning filmmaker. Urale's short film O Tamaiti won the prestigious Best Short Film at the Venice Film Festival in 1996. Her first feature film Apron Strings opened the 2008 NZ International Film Festival. The feature film Siones Wedding, co-written by Oscar Kightley, was financially successful following premieres in Auckland and Apia. The 2011 film The Orator was the first ever fully Samoan film, shot in Samoa in the Samoan language with a Samoan cast telling a uniquely Samoan story. Written and directed by Tusi Tamasese, it received much critical acclaim and attention at film festivals throughout the world.
Document 11: Elizabeth II: The 1960s and 1970s saw an acceleration in the decolonisation of Africa and the Caribbean. Over 20 countries gained independence from Britain as part of a planned transition to self-government. In 1965, however, the Rhodesian Prime Minister, Ian Smith, in opposition to moves toward majority rule, declared unilateral independence from Britain while still expressing "loyalty and devotion" to Elizabeth. Although the Queen dismissed him in a formal declaration, and the international community applied sanctions against Rhodesia, his regime survived for over a decade. As Britain's ties to its former empire weakened, the British government sought entry to the European Community, a goal it achieved in 1973.
Document 12: History of India: From 1920 leaders such as Mahatma Gandhi began highly popular mass movements to campaign against the British Raj using largely peaceful methods. The Gandhi-led independence movement opposed the British rule using non-violent methods like non-cooperation, civil disobedience and economic resistance. However, revolutionary activities against the British rule took place throughout the Indian subcontinent and some others adopted a militant approach like the Indian National Army that sought to overthrow British rule by armed struggle. The Government of India Act 1935 was a major success in this regard. All these movements succeeded in bringing independence to the new dominions of India and Pakistan on 15 August 1947.
Document 13: Senate of Ceylon: The Senate was the upper chamber of the parliament of Ceylon (now Sri Lanka) established in 1947 by the Soulbury Commission. The Senate was appointed and indirectly elected rather than directly elected. It was housed in the old Legislative Council building in Colombo Fort and met for the first time on 12 November 1947. The Senate was abolished on 2 October 1971 by the eighth amendment to the Soulbury Constitution, prior to the adoption of the new Republican Constitution of Sri Lanka on 22 May 1972. In 2010 there were proposals to reintroduce the Senate.
Document 14: D. S. Senanayake: Don Stephen Senanayake (; ; 21 October 1883 – 22 March 1952) was a Sri Lankan statesmen. He was the first Prime Minister of Sri Lanka having emerged as the leader of the Sri Lankan independence movement that led to the establishment of self-rule in Sri Lanka. He is considered as the "Father of the Nation".
Document 15: Sri Lankan independence movement: The Sri Lankan independence movement was a peaceful political movement which aimed at achieving independence and self - rule for Sri Lanka, then Ceylon, from the British Empire. It was initiated around the turn of the 20th century and led mostly by the educated middle class. It succeeded when, on February 4, 1948, Ceylon was granted independence as the Dominion of Ceylon. Dominion status within the British Commonwealth was retained for the next 24 years until May 22, 1972 when it became a republic and was renamed the Republic of Sri Lanka.
ground_truth: February 4, 1948
sub_queries: What was Robin Tampoe birth country? Answer: Sri Lanka
when did Sri Lanka leave the british empire Answer: February 4, 1948