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

full_context: Document 1: Heiyantuduwa Raja (elephant): Heiyantuduwa Raja (Sinhala:හෙයියන්තුඩුවේ රාජා) was a Sri Lankan elephant, which carried the Relic of the tooth of the Buddha casket in the Dalada Perahera for 11 years after the demise of Maligawa Raja. Heiyantuduwa Raja's tusks were each in length when he was living and it was considered as one of the longest-tusked elephants in the country.
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: Reswehera: Reswehera Rajamaha Vihara is an ancient temple which was built by the king Devanampiya Tissa (307BC-267BC) situated in north western province in Sri Lanka.
Document 4: 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 5: 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 6: 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 7: Somawathiya Chaitya: The Somawathiya Chaitya is a Buddhist Stupa situated in the ancient city of Polonnaruwa, Sri Lanka. Chaitya premises is called the Somawathiya Rajamaha Viharaya.
Document 8: Sooriyawewa: Sooriyawewa is a town in Sri Lanka. It is located in Hambantota District of Southern Province, Sri Lanka. Mahinda Rajapaksa International Stadium is situated here.
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: 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 11: 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 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: Temple of the Tooth: Sri Dalada Maligawa or the Temple of the Sacred Tooth Relic is a Buddhist temple in the city of Kandy, Sri Lanka. It is located in the royal palace complex of the former Kingdom of Kandy, which houses the relic of the tooth of the Buddha. Since ancient times, the relic has played an important role in local politics because it is believed that whoever holds the relic holds the governance of the country. Kandy was the last capital of the Sri Lankan kings and is a World Heritage Site mainly due to the temple.
Document 14: Anuradhapura Kingdom: Another notable king of the Anuradhapura Kingdom is Valagamba (103, 89–77 BC), also known as Vatthagamani Abhaya, who was overthrown by five invaders from South India. He regained his throne after defeating these invaders one by one and unified the country again under his rule. Saddha Tissa (137–119 BC), Mahaculi Mahatissa (77–63 BC), Vasabha (67–111), Gajabahu I (114–136), Dhatusena (455–473), Aggabodhi I (571–604) and Aggabodhi II (604–614) were among the rulers who held sway over the entire country after Dutthagamani and Valagamba. Rulers from Kutakanna Tissa (44–22 BC) to Amandagamani (29–19 BC) also managed to keep the whole country under the rule of the Anuradhapura Kingdom. Other rulers could not maintain their rule over the whole island, and independent regions often existed in "Ruhuna" and "Malayarata" (hill country) for limited periods. During the final years of the Anuradhapura Kingdom, rebellions sprang up and the authority of the kings gradually declined. By the time of Mahinda V (982–1017), the last king of the Anuradhapura Kingdom, the rule of the king had become so weak that he could not even properly organize the collection of taxes.
Document 15: Suvisuddharamaya: The Sri Suvisuddharamaya Temple is a Buddhist temple which is located in the North-Western province, Manakkulama, in Sri Lanka. The website www.saddha.org has noted:
ground_truth: February 4, 1948
sub_queries: Reswehera >> country Answer: Sri Lanka
when did Sri Lanka leave the british empire Answer: February 4, 1948