Question: When did the country where Yatawara is located leave the British Empire?

full_context: Document 1: Bogawantalawa: Bogawantalawa (also spelled Bogawanthalawa) is a small town in the Central province of Sri Lanka. It is at 1514 m elevation above sea level, about 150 km east of Colombo, famous for its tea estates.
Document 2: 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 3: 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 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: Yatawara: Yatawara is a village in Sri Lanka. It is located within Kandy District, Central Province. It is located on the Wattegama-Matale (B462) road, about 4.5 kilometres from Wattegama.
Document 6: Galabawa: Galabawa is a village in Sri Lanka. It is located within Central Province.Its situated in west border of central province near the border of north western province .Its history makes back to BC where the King Walagamba once reside here before became the king of sri lanka
Document 7: 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 8: 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 9: Maddegama: Maddegama is a village in the western province, Sri Lanka of Sri Lanka. It is located next to the Kirindiwela-Hanwella road.
Document 10: Koswatte: Koswatta is a junction located inside the main town Battaramulla located near Colombo in Sri Lanka. The junction is also known as the "Thalangama-Koswatte" junction.
Document 11: 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 12: Pohorabawa: Pohorabawa is a village in the Ratnapura District in the Sabaragamuwa Province of Sri Lanka. It is divided into Ihala Pohorabawa and Pahala Pohorabawa. The village has a school, a post office, and a rural bank.
Document 13: Gammaduwa: Gammaduwa is a village in Sri Lanka. It is located within Matale District, Central Province with a picturesque landscape and temperate climate. It is situated at an elevation of 931 m (3,054 ft) above sea level. The area is mildly densely populated with 532 people per km. The population of the village, according to the 2018 census, was 5,294. Matale is the nearest town and takes about 1:20 hour by local transportation.
Document 14: Nittambuwa: Nittambuwa is a town, situated in Gampaha District, Sri Lanka. The town situated on the Colombo-Kandy highway. It is connected also to Negombo with the highway via Veyangoda-Minuwangoda.It was the home town of first prime minister S W R D Bandaranayake and prime minister Sirimawo Bandaranayake.
Document 15: 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.
ground_truth: February 4, 1948
sub_queries: Yatawara >> country Answer: Sri Lanka
when did Sri Lanka leave the british empire Answer: February 4, 1948