Given the task definition and input, reply with output. In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Gabon, officially the Gabonese Republic, is a sovereign state on the west coast of Central Africa. Located on the equator, Gabon is bordered by Equatorial Guinea to the northwest, Cameroon to the north, the Republic of the Congo on the east and south, and the Gulf of Guinea to the west. It has an area of nearly and its population is estimated at 1.5 million people. Its capital and largest city is Libreville., The Atlantic Ocean is the second largest of the world's oceans with a total area of about . It covers approximately 20 percent of the Earth's surface and about 29 percent of its water surface area. It separates the "Old World" from the "New World"., Cape Lopez is a 55 km-long peninsula on the coast of west central Africa, in the country of Gabon. It separates the Gulf of Guinea from the South Atlantic Ocean,, Guinea , officially the Republic of Guinea, is a country on the West coast of Africa. Formerly known as French Guinea, the modern country is sometimes referred to as Guinea-Conakry in order to distinguish it from other parts of the wider region of the same name, such as Guinea-Bissau and Equatorial Guinea. Guinea has a population of 10.5 million and an area of ., The Old World consists of Africa, Europe, and Asia, regarded collectively as the part of the world known to Europeans before contact with the Americas. It is used in the context of, and contrast with, the New World (Americas)., The Soninke language (Soninke: "Sooninkanxanne") is a Mande language spoken by the Soninke people of West Africa. The language has an estimated 1,096,795 speakers, primarily located in Mali, and also (in order of numerical importance of the communities) in Senegal, Ivory Coast, The Gambia, Mauritania, Guinea-Bissau, Guinea and Ghana. It enjoys the status of a national language in Mali, Senegal, and Mauritania., The Volta River is a river , primarily flowing in Ghana , that drains into the Atlantic Ocean at the Gulf of Guinea . It has three main tributaries -- the Black Volta , White Volta and Red Volta ., Black Volta is a river that flows through Burkina Faso flowing about 1,352 km (840 mi) to the White Volta in Dagbon. The Black Volta forms part of the border between Ghana and Côte d'Ivoire and Burkina Faso. Within Ghana, it forms the border between Northern and Brong-Ahafo Regions. The Bui Dam is built on the river in Ghana., Togo, officially the Togolese Republic, is a country in West Africa bordered by Ghana to the west, Benin to the east and Burkina Faso to the north. It extends south to the Gulf of Guinea, where its capital Lomé is located. Togo covers , making it one of the smallest countries in Africa, with a population of approximately 7.5 million., Ghana, officially the Republic of Ghana is a unitary presidential constitutional democracy, located along the Gulf of Guinea and Atlantic Ocean, in the subregion of West Africa. Spanning a land mass of 238,535 km², Ghana is bordered by the Ivory Coast in the west, Burkina Faso in the north, Togo in the east and the Gulf of Guinea and Atlantic Ocean in the south. "Ghana" means "Warrior King" in the Soninke language., 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, São Tomé and Príncipe and Togo., Ivory Coast or Côte d'Ivoire , officially named the Republic of Côte d'Ivoire, is a country located in West Africa. Ivory Coast's political capital is Yamoussoukro, and its economic capital and largest city is the port city of Abidjan. Its bordering countries are Guinea and Liberia in the west, Burkina Faso and Mali in the north, and Ghana in the east. The Gulf of Guinea (Atlantic Ocean) is located south of Ivory Coast., The Gulf of Guinea is the northeasternmost part of the tropical Atlantic Ocean between Cape Lopez in Gabon, north and west to Cape Three Points in Western region Ghana. The intersection of the Equator and Prime Meridian (zero degrees latitude and longitude) is in the gulf., Burkina Faso is a landlocked country in Africa around in size. It is surrounded by six countries: Mali to the north; Niger to the east; Benin to the southeast; Togo and Ghana to the south; and Ivory Coast to the southwest. Its capital is Ouagadougou. In 2014 its population was estimated at just over 17.3 million. Burkina Faso is a francophone country and French is an official language of government and business. Formerly called the Republic of Upper Volta, the country was renamed "Burkina Faso" on 4 August 1984 by then-President Thomas Sankara. Residents of Burkina Faso are known as "Burkinabé"., The New World is one of the names used for the Earth's Western Hemisphere, specifically the Americas (including nearby islands such as those of the Caribbean and Bermuda)., Subject: volta river, Relation: continent, Options: (A) africa (B) the americas
africa