Question: What is the country Adavi is located in named after?

full_context: Document 1: Mariga, Nigeria: Mariga is a Local Government Area in Niger State, Nigeria. Its headquarters are in the town of Bangi in the north of the area.
Document 2: Nigeria: The name "" was taken from the Niger River running through the country. This name was coined in the late 19th century by British journalist Flora Shaw, who later married Lord Lugard, a British colonial administrator. The origin of the name "Niger", which originally applied only to the middle reaches of the Niger River, is uncertain. The word is likely an alteration of the Tuareg name "egerew n-igerewen" used by inhabitants along the middle reaches of the river around Timbuktu prior to 19th-century European colonialism.
Document 3: Agaie: Agaie is a Local Government Area in Niger State, Nigeria. Its headquarters are in the town of Agaie on the A124 highway.
Document 4: Nigeria: Modern-day Nigeria has been the site of numerous kingdoms and tribal states over the millennia. The modern state originated from British colonial rule beginning in the 19th century, and the merging of the Southern Nigeria Protectorate and Northern Nigeria Protectorate in 1914. The British set up administrative and legal structures whilst practising indirect rule through traditional chiefdoms. Nigeria became a formally independent federation in 1960, and plunged into a civil war from 1967 to 1970. It has since alternated between democratically-elected civilian governments and military dictatorships, until it achieved a stable democracy in 1999, with its 2011 presidential elections being viewed as the first to be conducted reasonably freely and fairly.
Document 5: Nigeria: In 1885, British claims to a West African sphere of influence received recognition from other European nations at the Berlin Conference. The following year, it chartered the Royal Niger Company under the leadership of Sir George Taubman Goldie. In 1900 the company's territory came under the control of the British government, which moved to consolidate its hold over the area of modern Nigeria. On 1 January 1901, Nigeria became a British protectorate, and part of the British Empire, the foremost world power at the time. In the late 19th and early 20th centuries the independent kingdoms of what would become Nigeria fought a number of conflicts against the British Empire's efforts to expand its territory. By war, the British conquered Benin in 1897, and, in the Anglo-Aro War (1901–1902), defeated other opponents. The restraint or conquest of these states opened up the Niger area to British rule.
Document 6: History of Nigeria: In 1914, the area was formally united as the Colony and Protectorate of Nigeria. Administratively, Nigeria remained divided into the Northern and Southern Provinces and Lagos Colony. Western education and the development of a modern economy proceeded more rapidly in the south than in the north, with consequences felt in Nigeria's political life ever since. Following World War II, in response to the growth of Nigerian nationalism and demands for independence, successive constitutions legislated by the British Government moved Nigeria toward self - government on a representative and increasingly federal basis. On 1 October 1954, the colony became the autonomous Federation of Nigeria. By the middle of the 20th century, the great wave for independence was sweeping across Africa. On 27 October 1958 Britain agreed that Nigeria would become an independent state on 1 October 1960.
Document 7: Adavi, Nigeria: Adavi is a Local Government Area in Kogi State, Nigeria, adjoining Edo State in the south and the state capital Lokoja in the north. Its headquarters are in the town of Ogaminana near the A123 highway in the southwest of the area at.
Document 8: Sawaba: Sawaba was an outgrowth of several sources, and passed through several name changes prior to Niger's independence from France in 1959-1960. Under first the French Union and then the French Community, the colonies of French West Africa began to develop semi-autonomous political institutions in the decade and a half of the French Fourth Republic. Territories, like Niger, were granted consultative posts, first to the colonial government of West Africa (in Dakar), and later in Territorial Assemblies. These bodies had very limited powers, limited seats for Africans, and those elected were chosen by a very restricted electorate.
Document 9: Igabi: Igabi is a Local Government Area (LGA) of Kaduna State, Nigeria. It is one of 774 local government areas (LGAs) in Nigeria. The first confirmed H5N1 (bird flu) outbreak in an African country was on February 8, 2006 on a commercial chicken farm in Jaji, a village in Igabi.
Document 10: Gurara: Gurara is a Local Government Area in Niger State, Nigeria, adjoining the Federal Capital Territory. Its headquarters are in the town of Gawu.
Document 11: Nigeria: The name Nigeria was taken from the Niger River running through the country. This name was allegedly coined in the late 19th century by British journalist Flora Shaw, she was inspired by the name of the river, in preference to terms such as "Central Sudan". The origin of the name ''Nigeria'' came from the name of the Niger River. The word ( Niger )  is an alteration of the Tuareg name egerew n-igerewen used by inhabitants along the middle reaches of the river around Timbuktu prior to 19th-century European colonialism. Egerew n-igerewen means River of the Rivers.
Document 12: Owan East: Owan East is a Local Government Area of Edo State, Nigeria. The headquarters is in the town of Afuze. The Owan East Local Government Area comprises 69 towns/villages made up of eight clans (Emai, Igue, Ihievbe, Ikao, Ivbi-Mion, Ive-Ada-Obi, Otuo and Uokha). Owan-East is bordered in the North by Akoko-Edo LGA, in the East by Etsako-West LGA, at the West is Ekiti State, at the South-West we find the sister local government- Owan-West, while in the South are Esan Central LGA and Uhunmwonde LGA.
Document 13: Nigerian nationalism: Nigerian nationalism asserts that Nigerians are a nation and promotes the cultural unity of Nigerians. Nigerian nationalism is a territorial nationalism, emphasizing a cultural connection of the people to the land -- in particular the Niger and Benue rivers. It first emerged in the 1920s under the influence of Herbert Macaulay who is considered the founder of Nigerian nationalism. It was founded because of the belief in the necessity for the people living in the British colony of Nigeria of multiple backgrounds to unite as one people in order to be able to resist colonialism. The people of Nigeria came together as they recognized the discrepancies of British policy. ``The problem of ethnic nationalism in Nigeria came with the advent of colonialism. This happened when disparate, autonomous, heterogeneous and sub - national groups were merged together to form a nation. Again, the colonialists created structural imbalances within the nation in terms of socio - economic projects, social development and establishment of administrative centres. This imbalance deepened the antipathies between the various ethnic nationalities in Nigeria (Nnoli, 1980; Y oung, 1993 and Aluko, 1998). ''The Nigerian nationalists' goal of achieving an independent sovereign state of Nigeria was achieved in 1960 when Nigeria declared its independence and British colonial rule ended. Nigeria's government has sought to unify the various peoples and regions of Nigeria since the country's independence in 1960.
Document 14: Ipokia: Ipokia is a Local Government Area in the west of Ogun State, Nigeria bordering the Republic of Benin. Its headquarters is Ipokia town. There are other towns like Idiroko, Oniro, Ita Egbe, Ihunbo, Agosasa, Aseko, Maun, Koko, Iropo, Alaari, Tube, Ilashe, Ifonyintedo, Madoga, Ijofin and Tongeji in the town of Ipokia at.
Document 15: Garko, Nigeria: Garko is a Local Government Area in Kano State, Nigeria. Its headquarters are in the town of Garko on the A237 highway.
ground_truth: Niger River
sub_queries: Adavi >> country Answer: Nigeria
The Nigeria was named for whom? Answer: Niger River