Question: Who was the first leader of the country that Samba Mappangala is from?

full_context: Document 1: Republic of the Congo: Under the 1963 constitution, Massamba-Débat was elected President for a five-year term. During Massamba-Débat's term in office the regime adopted "scientific socialism" as the country's constitutional ideology. In 1965, Congo established relations with the Soviet Union, the People's Republic of China, North Korea and North Vietnam. Massamba-Débat's regime also invited several hundred Cuban army troops into the country to train his party's militia units and these troops helped his government survive a coup in 1966 led by paratroopers loyal to future President Marien Ngouabi. Nevertheless, Massamba-Débat was unable to reconcile various institutional, tribal and ideological factions within the country and his regime ended abruptly with a bloodless coup d'état in September 1968.
Document 2: 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 3: North Kivu: The province consists of three cities—Goma, Butembo and Beni—and six territories—Beni, Lubero, Masisi, Rutshuru, Nyiragongo and Walikale. The province is home to the Virunga National Park, a World Heritage Site containing the endangered mountain gorillas.
Document 4: Michel Boyibanda: Michel Boyibanda is a soukous recording artist, composer, and vocalist in the Republic of the Congo. He was once a member of the soukous band TPOK Jazz, led by François Luambo Makiadi, which dominated the Congolese music scene from the 1950s through the 1980s.
Document 5: Samba Mapangala: Samba Mapangala was born in Matadi in what is now the Democratic Republic of Congo. He spent early 1970s with various bands in Kinshasa, before moving to Uganda in 1975 where he and some other Congolese musicians formed the Les Kinois band. They moved to Nairobi in 1977. He formed a new band, the Orchestra Virunga, in 1981. The band is named after Virunga volcano located in Congo.
Document 6: 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 7: 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 8: Bugamba: Bugamba is a town in Uganda with an approximate population of 27,664 and an average elevation of 4,878 feet above sea level. It is one of the trading centres in Mbarara District. It is the home town of Francis K. Butagira, former Permanent Ambassador to the United Nations for Uganda and now Presidential advisor. It neighbours with Ndeija sub county, Mwiizi and Ruhaama which is found in Ntungamo District.
Document 9: Central African Republic: What is today the Central African Republic has been inhabited for millennia; however, the country's current borders were established by France, which ruled the country as a colony starting in the late 19th century. After gaining independence from France in 1960, the Central African Republic was ruled by a series of autocratic leaders; by the 1990s, calls for democracy led to the first multi-party democratic elections in 1993. Ange-Félix Patassé became president, but was later removed by General François Bozizé in the 2003 coup. The Central African Republic Bush War began in 2004 and, despite a peace treaty in 2007 and another in 2011, fighting broke out between various factions in December 2012, leading to ethnic and religious cleansing of the Muslim minority and massive population displacement in 2013 and 2014.
Document 10: 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 11: Sam Mangwana: Sam Mangwana (born February 21, 1945), is a Congolese musician, born to a Zimbabwean migrant father and an Angolan mother. He is the frontman of his bands "Festival des Maquisards" and "African All Stars". Mangwana was a member of François Luambo Makiadi's seminal band TPOK Jazz, and Tabu Ley Rochereau's bands African Fiesta, African Fiesta National and Afrisa International.
Document 12: Republic of the Congo: Pascal Lissouba, who became Congo's first elected president (1992–1997) during the period of multi-party democracy, attempted to implement economic reforms with IMF backing to liberalise the economy. In June 1996 the IMF approved a three-year SDR69.5m (US$100m) enhanced structural adjustment facility (ESAF) and was on the verge of announcing a renewed annual agreement when civil war broke out in Congo in mid-1997.
Document 13: Banda, Uganda: Banda is a hill that lies in Nakawa Division, within Kampala, the capital of Uganda, the third-largest economy in the East African Community. Banda also refers to the neighborhoods on the slopes of the hill and between Banda Hill and Kireka, extending all the way to the Kampala-Jinja Highway. The southwestern slopes of the hill are occupied by the neighbourhood known as Kyambogo, and is the location of the campus of Kyambogo University, one of the nine public universities in the country.
Document 14: 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 15: Singa Mwambe: Singa Mwambe is a football club in Kisangani, Democratic Republic of Congo.  In the 2006/2007 season they played in the Linafoot, the top level of professional football in DR Congo.
ground_truth: Fulbert Youlou
sub_queries: Samba Mapangala >> country of citizenship Answer: Congo
Who was the first leader of the independent Congo ? Answer: Fulbert Youlou