Question: When did the country where Lusanga is located become independent?

full_context: Document 1: Luena, Moxico Province: Luena (pre-1975: Luso) is a town located in east central Angola. It is the administrative capital of Moxico Province. While no exact figures are available, estimates on the population of the city varies from 60,000 to 200,000 residents, including an unknown number of refugees from the Angolan Civil War that officially ended in 2002.
Document 2: Joseph Kabila: On 28 March 2004, an apparent coup attempt or mutiny around the capital Kinshasa, allegedly by members of the former guard of former president Mobutu Sese Seko (who had been ousted by Kabila's father in 1997 and died in the same year), failed. On 11 June 2004, coup plotters led by Major Eric Lenge allegedly attempted to take power and announced on state radio that the transitional government was suspended, but were defeated by loyalist troops.
Document 3: Luau, Moxico Province: Luau is a municipality in Angola in the province of Moxico on the border with the Democratic Republic of Congo.
Document 4: Lubao, Democratic Republic of the Congo: Lubao is a town and territory in Kabinda District, Kasai-Oriental Province, Democratic Republic of the Congo. It lies near the eastern bank of the Lomami River.
Document 5: Zaire: Zaire (/ zɑːˈɪər /), officially the Republic of Zaire (French: République du Zaïre; French pronunciation: ​ (za. iʁ)), was the name for the Democratic Republic of the Congo that existed between 1971 and 1997 in Central Africa. The country was a one - party totalitarian dictatorship, run by Mobutu Sese Seko and his ruling Popular Movement of the Revolution party. Zaire was established following Mobutu's seizure of power in a military coup in 1965, following five years of political upheaval following independence known as the Congo Crisis. Zaire had a strongly centralist constitution and foreign assets were nationalised. The period is sometimes referred to as the Second Congolese Republic.
Document 6: Luanda Municipality: The Municipality of Luanda is one of the seven municipalities that make up the province of Luanda, Angola, as per the new administrative division of the province (the others being Belas, Cazenga, Cacuaco, Viana, Icolo e Bengo and Quiçama). It covers roughly 116 km2 (2nd smallest in province) and includes Ilha do Capo. The population of 2,165,867 in 2014 Census, and projected to be 2,487,444 in 2018 per Instituto Nacional de Estatística, República de Angola.
Document 7: Lusanga, Kwango: Lusanga is a town in the Kwango Province of the Democratic Republic of the Congo. The town is situated approximately 20 miles north of the Angolan border, and the same distance west of the Kwango River. It lies northeast of the town of Popokabaka. There is also another town called Lusanga in Kwilu District of Bandundu province, to the north of Kikwit.
Document 8: Chavuma: Chavuma is a town in North Western Zambia, lying immediately south of the border with Angola. The town is approximately 1,100 kilometers from Lusaka and 11 kilometers from the Angolan border town of Kalipande. It lies on the Zambezi River and the M8 road. Local attractions include the Chavuma Falls, while a market takes place on the border, permitting people from both nations to trade.
Document 9: History of the Democratic Republic of the Congo: After an uprising by the Congolese people, Belgium surrendered to the independence of the Congo in 1960. However, the Congo remained unstable because tribal leaders had more power than the central government. Prime Minister Patrice Lumumba tried to restore order with the aid of the Soviet Union as part of the Cold War, causing the United States to support a coup led by Colonel Joseph Mobutu in 1965. Mobutu quickly seized complete power of the Congo and renamed the country Zaire. He sought to Africanize the country, changing his own name to Mobutu Sese Seko, and demanded that African citizens change their Western names to traditional African names. Mobutu sought to repress any opposition to his rule, in which he successfully did throughout the 1980s. However, with his regime weakened in the 1990s, Mobutu was forced to agree to a power - sharing government with the opposition party. Mobutu remained the head of state and promised elections within the next two years that never took place.
Document 10: Republic of the Congo: Following the revision of the French constitution that established the Fifth Republic in 1958, the AEF dissolved into its constituent parts, each of which became an autonomous colony within the French Community. During these reforms, Middle Congo became known as the Republic of the Congo in 1958 and published its first constitution in 1959. Antagonism between the pro-Opangault Mbochis and the pro-Youlou Balalis resulted in a series of riots in Brazzaville in February 1959, which the French Army subdued.
Document 11: Republic of the Congo: The Republic of the Congo received full independence from France on August 15, 1960. Fulbert Youlou ruled as the country's first president until labour elements and rival political parties instigated a three-day uprising that ousted him. The Congolese military took charge of the country briefly and installed a civilian provisional government headed by Alphonse Massamba-Débat.
Document 12: Léua: Léua is a city in Angola of the Moxico province. The municipal headquarters are 62 km east of the provincial capital, Luena.
Document 13: Republic of the Congo: The region was dominated by Bantu-speaking tribes at least 3,000 years ago, who built trade links leading into the Congo River basin. Congo was formerly part of the French colony of Equatorial Africa. The Republic of the Congo was established on the 28th of November 1958 but gained independence from France in 1960. The sovereign state has had multi-party elections since 1992, although a democratically elected government was ousted in the 1997 Republic of the Congo Civil War, and President Denis Sassou Nguesso, who first came to power in 1979, has ruled for 35 of the past 40 years.
Document 14: Kasongo Lunda Territory: Kasongo Lunda is a territory in the Democratic Republic of Congo, located in Kwango Province. The capital lies at Kasongo Lunda. It is the second biggest territory in Congo, located near to the border with Angola.
Document 15: Republic of the Congo: The region was dominated by Bantu-speaking tribes, who built trade links leading into the Congo River basin. Congo-Brazzaville was formerly part of the French colony of Equatorial Africa. Upon independence in 1960, the former colony of French Congo became the Republic of the Congo. The People's Republic of the Congo was a Marxist–Leninist one-party state from 1970 to 1991. Multi-party elections have been held since 1992, although a democratically elected government was ousted in the 1997 Republic of the Congo Civil War and President Denis Sassou Nguesso has ruled for 26 of the past 36 years.
ground_truth: 1960
sub_queries: Lusanga >> country Answer: Democratic Republic of the Congo
when did Democratic Republic of the Congo become independent Answer: 1960