Question: Who was the first leader of the independent country that Zack Mwekassa held a citizenship?

full_context: Document 1: Mohamed Zaoui: Mohamed Zaoui (born May 14, 1960) is a former middleweight boxer from Algeria. He won the bronze medal at the 1984 Summer Olympics in Los Angeles, becoming the first Algerian to ever win a medal at the Olympic Games.
Document 2: Zack Mwekassa: Zack Mwekassa (born 20 January 1984) is a Congolese boxer and kickboxer who fights in GLORY. he is a former Interim Glory Light Heavyweight Champion
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: Somalis: In the martial arts, Faisal Jeylani Aweys and Mohamed Deq Abdulle also took home a silver medal and fourth place, respectively, at the 2013 Open World Taekwondo Challenge Cup in Tongeren. The Somali National Olympic committee has devised a special support program to ensure continued success in future tournaments. Additionally, Mohamed Jama has won both world and European titles in K1 and Thai Boxing.
Document 5: US Tshinkunku: Union Sportive (US) Tshinkunku' is a football club in Kananga, Kasai Central province, Democratic Republic of Congo.[1] They play in the Linafoot, the top level of professional football in DR Congo. They play at 20,000 capacity Stade des Jeunes.[1]. Tshinkunku had their first major success in 1985, when they won the National Championship Cup called Cup of Zaire (Coupe du Zaire) when Georges Mwanza Mande, alias Tshikem was the club president. In 2011, Trésor Kapuku, then the governor of Kasai Occidental brought second title back to the province when he was the President of US Tshinkunku Club.In January 2014 the governor of then Kasai Occidental Alex Kande Mupompa was elected as the new club President, two years later the club performed badly in the league and many fans were not happy with the management committee performance. Alexy Kayembe De Bampende a long-time fan and a US based businessman who lives in Texas invited Georges Mwanza Tshikem to come to rebuild the team. Tshikem went to Kananga where he organized the team and the election for management committee. On 4 December 2016, club fans and players elected Georges Mwanza Mande, alias Tshikem as club president and Alexy Kayembe De Bampende was elected Vice President of Union Sportive Tshinkunku. Tshikem-Kayembe's vision is to make Tshinkunku a competitive club in national and International level. So far they managed to recruit Congolese qualified coaches to manage the team. Eric Tshibasu, the under-20 DR Congo national team was hired as a team club coach and was fired three months later, Kayembe approached Jean Claude Mukanya, the former DR Congo National team captain to become US Tshinkunku Manager. Mukanya signed a three year contract in Kinshasa on 3 July 2017 in front of hundreds of Kinshasa based US Tshinkunku fans.
Document 6: Szapsel Rotholc: Born into a Jewish family in Warsaw, he was a member of the "Gwiazda Warszawa" Boxing Club in 1929–1939. He won the bronze medal in the Flyweight class at the 1934 European Amateur Boxing Championships in Budapest. In 1933 he won the Polish champion title. He represented Poland in many matches: POL vs. HUN (1934, 1935), POL vs. USA (1934), POL vs. CZE (1934), POL vs. GER (1934, 1935, 1938), POL vs. NOR (1937), POL vs. DEN (1937), POL vs. ITA (1938), POL vs. FRA (1938), POL vs. SUI (1938), POL vs. EST (1938), POL vs. SWE (1939), POL vs. FIN (1939), scoring +15 –0 =1. He played also for Warsaw in duals against Dublin (1937), Vienna (1939) and Italy (1939), scoring +2 –1 =0. Rotholc won all fights except two, one drew and one loss with an Italian boxer Guido Nardecchia.
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: Mohamed Azzaoui: Mohamed Azzaoui (born December 1, 1975 in Mostaganem) is a retired amateur boxer from Algeria, who is best known for winning the gold medal in the men's heavyweight division (– 91 kg) at the 1999 All-Africa Games in Johannesburg, South Africa. He represented his native country at the 2000 Summer Olympics in Sydney, Australia, where he was defeated in the first round by Jackson Chanet from France. He is also a former New Zealand and Pan Asian Boxing Association cruiserweight champion.
Document 9: Jolly Katongole: Jolly Katongole (15 December 1985 – 14 May 2015) was a boxer from Uganda, who participated in the 2004 Summer Olympics for his native African country. There he was stopped in the first round of the light flyweight (– 48 kg) division by Turkey's eventual runner-up Atagün Yalçınkaya.
Document 10: 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 11: Floyd Mayweather Jr. vs. Robert Guerrero: Weight Class Result Round Time Notes Welterweight Floyd Mayweather Jr. def. Robert Guerrero Unanimous Decision 12 3: 00 Championship bout. Featherweight Abner Mares def. Daniel Ponce De Leon TKO 9 2: 20 Championship bout. Super Bantamweight Léo Santa Cruz def. Alexander Muñoz TKO 5 1: 05 Middleweight J'Leon Love vs. Gabriel Rosado No Contest 10 3: 00 Super Middleweight Ronald Gavril def. Roberto Yong TKO 2: 12 Super Middleweight Lanell Bellows def. Matt Garretson TKO 0: 32 Super Middleweight Luis Arias def. DonYil Livingston Majority Decision 6 3: 00 Light Heavyweight Badou Jack def. Michael Gbenga TKO 2: 26
Document 12: 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 13: 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 14: 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 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: Fulbert Youlou
sub_queries: Zack Mwekassa >> country of citizenship Answer: Congo
Who was the first leader of the independent Congo ? Answer: Fulbert Youlou