Question: When did the country that has the birthplace of Delain Sasa as its capital become independent?

full_context: Document 1: Republic of the Congo: The capital, Brazzaville, is located on the Congo River, in the south of the country, immediately across from Kinshasa, the capital of the Democratic Republic of the Congo.
Document 2: 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 3: TS Malekesa: TS Malekesa is a football club in Kisangani, Democratic Republic of Congo.  They formerly played in the Linafoot, the top level of professional football in DR Congo, and the Stade Lumumba with a capacity of 30,000
Document 4: Jean-Santos Muntubila: He played for AS Bilima Kinshasa, FC Sochaux-Montbéliard, Olympique de Marseille, 1. FC Saarbrücken, SC Bastia, US Valenciennes and ESA Brive.
Document 5: Republic of the Congo: The southwest of the country is a coastal plain for which the primary drainage is the Kouilou-Niari River; the interior of the country consists of a central plateau between two basins to the south and north. Forests are under increasing exploitation pressure.
Document 6: 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 7: 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 8: 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 9: Republic of the Congo: The Republic of the Congo's sparse population is concentrated in the southwestern portion of the country, leaving the vast areas of tropical jungle in the north virtually uninhabited. Thus, Congo is one of the most urbanized countries in Africa, with 70% of its total population living in a few urban areas, namely in Brazzaville, Pointe-Noire or one of the small cities or villages lining the 534-kilometre (332 mi) railway which connects the two cities. In rural areas, industrial and commercial activity has declined rapidly in recent years, leaving rural economies dependent on the government for support and subsistence.
Document 10: 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 11: Lelo Mbele: Blaise Lelo Mbele (born 10 August 1987 in Kinshasa) is a Congolese footballer who last played for Gokulam Kerala FC in the I-League. Lelo previously played for different professional clubs such as South African giants, Orlando Pirates FC and the Saudi Arabian club, Al-Hilal FC.
Document 12: Republic of the Congo: Congo is located in the central-western part of sub-Saharan Africa, along the Equator, lying between latitudes 4°N and 5°S, and longitudes 11° and 19°E. To the south and east of it is the Democratic Republic of Congo. It is also bounded by Gabon to the west, Cameroon and the Central African Republic to the north, and Cabinda (Angola) to the southwest. It has a short coast on the Atlantic Ocean.
Document 13: Samba Diawara: Samba Diawara (born 15 March 1978 in Paris) is a Malian football player, who currently plays for AFC Tubize in Belgium.
Document 14: Delain Sasa: Delain Sasa (born March 9, 1979 in Kinshasa) is a football striker from Congo DR. He currently plays for KS Bylis Ballsh in Albania. He previously played in Germany for Bayer Leverkusen and KFC Uerdingen 05, in Turkey for Erzurumspor, and in Albania for KF Partizani Tirana and Flamurtari.
Document 15: Republic of the Congo: The Republic of the Congo (French: République du Congo), also known as Congo, Congo Republic, West Congo[citation needed], or Congo-Brazzaville, is a country located in Central Africa. It is bordered by five countries: Gabon to the west; Cameroon to the northwest; the Central African Republic to the northeast; the Democratic Republic of the Congo to the east and south; and the Angolan exclave of Cabinda to the southwest.
ground_truth: 1960
sub_queries: Delain Sasa >> place of birth Answer: Kinshasa
What country does Kinshasa serve as capital of? Answer: Democratic Republic of the Congo
when did Democratic Republic of the Congo become independent Answer: 1960