Question: When did the country containing Nepoko become independent?

full_context: Document 1: Nepoko River: The Nepoko River is a river in the Democratic Republic of the Congo. It joins the Ituri River at the town of Bomili to form the Aruwimi River.
Document 2: Nicolum River: The Nicolum River, formerly Nicolum Creek, is a tributary of the Coquihalla River, rising in the Cascade Mountains and flowing northwest to join that stream near the town of Hope, British Columbia, Canada. Nicolum River Provincial Park is located at the confluence of the two rivers.
Document 3: 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 4: Namoi River: The Namoi River rises on the western slopes of the Moonbi Range and Great Dividing Range, near Niangala, at the convergence of the Macdonald River and Boundary Creek, and flows generally west, joined by twenty-seven tributaries, including the Peel, Manilla and Mooki rivers, before reaching its confluence with the Barwon River, near Walgett.
Document 5: Niemba: Niemba is a town in the Democratic Republic of Congo, Katanga Province. It is situated on the Lukuga River, a tributary of the Lualaba river. The population is around 1,800. It is connected by rail to Kalemie.
Document 6: 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 7: 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 8: 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 9: Lindi River: The Lindi is a minor river of northeastern Democratic Republic of the Congo. It flows through Tshopo District and North Kivu.
Document 10: 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 11: 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.
Document 12: 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 13: Gomti River: It meets a small river, the Gaihaaee, 20 kilometres (12 mi) from its origin. The Gomti is a narrow stream until it reaches Mohammadi Kheri, a tehsil of Lakhimpur Kheri district (about 100 km from its origin), where it is joined by tributaries such as the Sukheta, Choha and Andhra Choha. The river is then well - defined, with the Kathina tributary joining it at Mailani and Sarayan joining it at a village in Sitapur district. A major tributary is the Sai River, which joins the Gomti near Jaunpur. The Markandey Mahadeo temple is at the confluence of the Gomti and the Ganges.
Document 14: Mongala River: The Mongala River in northern Democratic Republic of the Congo is a tributary of the Congo River. The Ebola River forms the headstream of the Mongala River.
Document 15: Kwe Kwe River: Kwe Kwe River is a small river that runs by the town of Kwekwe in Zimbabwe. It is a lesser tributary of the Sebakwe River and it joins the Sebakwe River north of the town. The water from the river is used by the steel industry that forms the backbone of the town of Kwekwe. The Sebakwe River is a tributary of the mighty Zambezi River.
ground_truth: 1960
sub_queries: Nepoko >> country Answer: Democratic Republic of the Congo
when did Democratic Republic of the Congo become independent Answer: 1960