Information: - Liberia , officially the Republic of Liberia, is a country on the West African coast. Liberia means "Land of the Free" in Latin. It is bordered by Sierra Leone to its west, Guinea to its north and Ivory Coast to its east. It covers an area of and has a population of 4,503,000 people. English is the official language and over 20 indigenous languages are spoken, representing the numerous tribes who make up more than 95% of the population. The country's capital and largest city is Monrovia. - Sekou V. Keita ( born November 30 , 1979 in Nimba County ) is a retired Liberian footballer last playing for FC Olimpia Bli . - Sanniquellie is a city and the capital of Nimba County and Sanniquellie-Mahn District, Liberia. It is located in the north-east of the country at coordinates 0721'49" N 00842'40" W. The average altitude of the city is 420 metres above the sea level. As of the 2008 national census, the population stood at 11,415. The most represented tribes are Mano, Gio and Mandingo. - Nimba County is a county in the north-central portion of the West African nation of Liberia. One of 15 counties that comprise the first-level of administrative division in the nation, it has six districts. Sanniquellie serves as the capital with the area of the county measuring , the largest in the nation. As of the 2008 Census, it had a population of 462,026, making it the second most populous county in Liberia. - West Africa, also called Western Africa and the West of Africa, is the westernmost subregion of Africa. West Africa has been defined as including 18 countries: Benin, Burkina Faso, the island nation of Cape Verde, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, the island of Saint Helena, Senegal, Sierra Leone, Sao Tome and Principe and Togo. What object entity has the relation of 'country of citizenship' with the subject 'sekou keita'? Choices: - benin - burkina faso - gambia - guinea - ivory coast - liberia - mali - nigeria - senegal
A:
mali