Question: When did the country where Sandilipay is located 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: Puloly: Puloly is a village in Jaffna Peninsula, Northern Sri Lanka. It is located approximately 30 km from City of Jaffna. It's north part is Point Pedro town
Document 3: 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 4: Nithiravilai: Nithiravilai is a small metro city in Kanyakumari district, Tamil Nadu, India. It is a business city which caters its day to day needs and borders the state of Kerala. The Kerala border from the village is approximately 3 km. It is about 14 km from Marthandam and 9 km south to Kaliyakkavilai. The Laccadive sea coast of Arabian Sea is bordering through the coastal fishing towns of Chinnathurai and Thoothur. It is well connected to other nearby towns through roadways. Everybody in the village lives in harmony with different religions and castes.
Document 5: 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 6: Navatkuly: Navatkuly (pronounced Naavat-kuly)(Tamil: நாவற்குழி) is a town in Jaffna District, Northern Sri Lanka. It is located about 6.5 km from Jaffna.
Document 7: 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 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: Senate of Ceylon: The Senate was the upper chamber of the parliament of Ceylon (now Sri Lanka) established in 1947 by the Soulbury Commission. The Senate was appointed and indirectly elected rather than directly elected. It was housed in the old Legislative Council building in Colombo Fort and met for the first time on 12 November 1947. The Senate was abolished on 2 October 1971 by the eighth amendment to the Soulbury Constitution, prior to the adoption of the new Republican Constitution of Sri Lanka on 22 May 1972. In 2010 there were proposals to reintroduce the Senate.
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: Vaddukkoddai West: Sivan koviladi is a small town in Sri Lanka. It is located within Northern Province.This Small town famous to Cultural Dances & Hindu rituals.
Document 12: Kalkudah: Kalkudah or Kalkuda (Pronounced Kal-Kuda, Tamil translation rock-bay) is a coastal resort town located about 35 kilometers northwest of Batticaloa, Batticaloa District, Sri Lanka. It used to be a popular tourist destination, however due to 2004 Indian Ocean Tsunami and Sri Lankan Civil War tourist numbers have declined. Pasikudah and Kalkudah are located few kilometers apart.
Document 13: Sandilipay: Sandilipay is a town located 10 km from the City of Jaffna, Sri Lanka. The original name of Sandilipay is Kalvalai.
Document 14: Kallakudy: Kallakudi or Dalmiapuram is a small township in the Tiruchirapalli district of Tamil Nadu in India. It is located at a distance of 40 km from Tiruchirapalli Junction. This is the place which turned the career of Karunanidhi, the former chief minister of Tamil Nadu.
Document 15: 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.
ground_truth: February 4, 1948
sub_queries: Sandilipay >> country Answer: Sri Lanka
when did Sri Lanka leave the british empire Answer: February 4, 1948