Question: The birth country of Jayantha Ketagoda left the British Empire when?

full_context: Document 1: Rajapaksa cabinet: The Rajapaksa cabinet was the central government of Sri Lanka led by President Mahinda Rajapaksa between 2005 and 2015. It was formed in November 2005 after the presidential election and it ended in January 2015 after the opposition's victory in the presidential election. This Cabinet was called the Jambo Cabinet and holds the world record for the largest cabinet in the world.
Document 2: A. Paranjothy: Paranjothy contested the 2009 local government election as one of the Tamil National Alliance's candidates and was elected to the Jaffna Municipal Council. He contested the 2013 provincial council election as one of the TNA's candidates in Jaffna District and was elected to the Northern Provincial Council. After the election he was appointed to assist the Minister of Fisheries, Transport, Trade and Rural Development on rural development. He took his oath as provincial councillor in front of Chief Minister C. V. Vigneswaran at Veerasingam Hall on 11 October 2013.
Document 3: 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 4: 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 5: 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.
Document 6: 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 7: 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 8: Gamini Atukorale: Gamini Atukorale (2 April 1951 – 1 January 2002) was the former Transport, Highways and Civil Aviation Minister in Sri Lanka and former General Secretary and Deputy Leader of United National Party.
Document 9: Sanee Rohana Kodithuvakku: Sanee Rohana Kodithuvakku (born 15 February 1961) is a Sri Lankan politician and member of the Parliament of Sri Lanka. He belongs to the Sri Lanka Freedom Party.
Document 10: 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 11: Jayantha Ketagoda: Jayantha Ketagoda is a Sri Lankan politician, a member of the Parliament of Sri Lanka replacing Sarath Fonseka who was imprisoned. He belongs to the Democratic National Alliance.
Document 12: Felix Dias Bandaranaike: Felix Dias Bandaranaike (Sinhala:ෆෙලික්ස් ඩයස් බණඩාරනායක) (5 November 1930 – 26 June 1985) was a Sri Lankan politician who served as Cabinet Minister of Finance, Parliamentary Secretary for the Prime Minister and Defence and External Affairs ("de facto" foreign minister) (1960–1965) and Cabinet Minister of Justice (1970–77) in the cabinet of Prime Minister Mrs.Sirimavo Bandaranaike. He was a very popular person about the anti-corruption campaign and also known as the ""virtual leader of the state"" during the SLFP governments after the death of Prime minister S.W.R.D. Bandaranaike. He was very active in defeating two major coups against the government, one is 1962 attempted military coup and JVP's 1971 JVP Insurrection.
Document 13: B. Deniswaran: Deniswaran is lawyer. He contested the 2013 provincial council election as one of the Tamil National Alliance's candidates in Mannar District and was elected to the Northern Provincial Council. After the election he was appointed Minister of Fisheries, Transport, Trade and Rural Development. He took his oath as minister and provincial councillor in front of Chief Minister C. V. Vigneswaran at Veerasingam Hall on 11 October 2013.
Document 14: Murugesu Chandrakumar: Murugesu Chandrakumar is a member of the Parliament of Sri Lanka and the Deputy Chairman of Committees.He belongs to the Eelam People's Democratic Party. However, he contested under the symbol of United People's Freedom Alliance
Document 15: 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".
ground_truth: February 4, 1948
sub_queries: What was Jayantha Ketagoda birth country? Answer: Sri Lanka
when did Sri Lanka leave the british empire Answer: February 4, 1948