Question: When did the country containing the town of Hidallana leave the British Empire?

full_context: Document 1: 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 2: Al Hidd: Al Hidd (; transliterated: Al-Ḥidd) is a town in Bahrain, located on a sand spit on the southeastern extremity of Muharraq Island. The town has a large native Sunni population. It is also well known for its rich sea crabs as well as its clear blue seas.The altitude of Al Hidd is 3m.
Document 3: 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 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: 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 6: Habarana: Habarana (; ) is a small city in the Anuradhapura District of Sri Lanka. The location has some mid-range and up hotels aimed at package tourists, and is a departure point for other nearby locations of greater interest.
Document 7: Hidallana: Hidallana (also transcribed Hiddellana, Hidellana, Hidallana or in other ways) is a town in the Sabaragamuwa Province of Sri Lanka, located at latitude: 6°42'57.96", longitude: 80°22'46.2" near Ratnapura. The estimated mean elevation above sea level is 82 metres. The postal code is 70012.
Document 8: 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 9: Bentota: Bentota is a coastal town in Sri Lanka, located in the Galle District of the Southern Province, governed by an Urban Council. It is approximately south of Colombo and north of Galle. Bentota is situated on the southern bank of the Bentota River mouth, at an elevation of above the sea level. The name of the town is derived from a mythical story which claims a demon named 'Bem' ruled the tota or river bank.
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: 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: 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 13: Habakkala: Habakkala is a small town in Sri Lanka. It is located within Southern Province. The closest city to Habakkala is Bentota
Document 14: Haltota: Haltota is a city located in Western Province, Sri Lanka. It is a legendary city related to the King Raigam Bandara.
Document 15: Beragala: Beragala is a small town in Sri Lanka. It is located in Badulla District of Uva Province, Sri Lanka. It is located 183 km away from Colombo along the A4 Highway. The area is known for its natural environment, as well as for landslides.
ground_truth: February 4, 1948
sub_queries: Hidallana >> country Answer: Sri Lanka
when did Sri Lanka leave the british empire Answer: February 4, 1948