Question: When did the country where the village of Dandugama is located, leave the British Empire?

full_context: Document 1: Kosgama: Kosgama is a small town in Colombo District, Sri Lanka. Located 46 km from Colombo, on the A4 (Colombo - Avissawella) highway, it is also served by the Kelani Valley Railway Line. The town is administered by the Seethawaka Pradeshiya Sabha (Divisional Council).
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: Maddegama: Maddegama is a village in the western province, Sri Lanka of Sri Lanka. It is located next to the Kirindiwela-Hanwella road.
Document 4: Dolosbage: Dolosbage is a village in Sri Lanka. It is located within Central Province. The famous Raxawa and Kabaragala rocks are the main landmarks of this area. Dolosbage has many tea estates started during the colonial era. It has a cold climate due to its elevated position.
Document 5: 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 6: 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 7: Wickramasinhapura: Wickramasinhapura is a sub town which is located within the Battaramulla main town limit in the Western Province of Sri Lanka. It is a suburb of Colombo attached to the Kaduwela Municipal Council. Wickramasinhapura is located in between Pelawatte and Thalawathugoda. Independent Television Network (ITN) is located in Wickramasinhapura.
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: 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 10: Dandugama: Dandugama () is a village in Sri Lanka. It is own for Ja-Ela polling division at Gampaha District at Western Province, Sri Lanka.
Document 11: 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 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: Kadugannawa Electoral District: Kadugannawa electoral district was an electoral district of Sri Lanka between August 1947 and March 1960. The district was named after the town of Kadugannawa in Kandy District, Central Province. The 1978 Constitution of Sri Lanka introduced the proportional representation electoral system for electing members of Parliament. The existing 160 mainly single-member electoral districts were replaced with 22 multi-member electoral districts. Kadugannawa electoral district was replaced by the Kandy multi-member electoral district at the 1989 general elections, the first under the proportional representation system. The Kadugannawa electoral district was one of three multi-member constituencies, with two members, the others were Colombo Central and Balangoda.
Document 14: 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 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: Dandugama >> country Answer: Sri Lanka
when did Sri Lanka leave the british empire Answer: February 4, 1948