Question: What river is the country that the Ferronigerite-2N1S takes its name from named after?

full_context: Document 1: Nigeria: The Niger Delta Nembe Creek Oil field was discovered in 1973 and produces from middle Miocene deltaic sandstone-shale in an anticline structural trap at a depth of 2–4 km. In June 2013, the company announced a strategic review of its operations in Nigeria, hinting that assets could be divested. While many international oil companies have operated there for decades, by 2014 most were making moves to divest their interests, citing a range of issues including oil theft. In August 2014, Shell Oil Company said it was finalising its interests in four Nigerian oil fields.
Document 2: Brezinaite: Brezinaite, discovered in 1969, is a rare mineral composed of chromium and sulfur. It is found in meteorites, such as the Irwin-Ainsa meteorite (Tucson meteorite), its type locality. It was also found in the New Baltimore meteorite and the Sikhote-Alin meteorite. Brezinaite was named in honour of Aristides Brezina (1848–1909), a past Director of the Mineralogy-Petrology Section of the Natural History Museum, Vienna, Austria.
Document 3: Keilite: Keilite is an iron-magnesium sulfide mineral (chemical formula (Fe,Mg)S)) that is found in enstatite chondrites. Keilite is the iron-dominant analog of niningerite. Keilite is named after Klaus Keil (born 1934).
Document 4: Brucite: Brucite was first described in 1824 and named for the discoverer, American mineralogist, Archibald Bruce (1777–1818). A fibrous variety of brucite is called nemalite. It occurs in fibers or laths, usually elongated along [1010], but sometimes [1120] crystalline directions.
Document 5: 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 6: Ferronigerite-2N1S: Ferronigerite-2N1S was first discovered in the Kabba provence of central Nigeria in 1944; it was originally named Nigerite. Its name was later changed to nigerite-6H then to nigerite-6T and in 2003 ferronigertie-2N1S was approved by the International Mineralogical Association.
Document 7: Niobium: Columbium (symbol "Cb") was the name originally bestowed by Hatchett upon his discovery of the metal in 1801. The name reflected that the type specimen of the ore came from America (Columbia). This name remained in use in American journals—the last paper published by American Chemical Society with columbium in its title dates from 1953—while niobium was used in Europe. To end this confusion, the name niobium was chosen for element 41 at the 15th Conference of the Union of Chemistry in Amsterdam in 1949. A year later this name was officially adopted by the International Union of Pure and Applied Chemistry (IUPAC) after 100 years of controversy, despite the chronological precedence of the name columbium.  This was a compromise of sorts; the IUPAC accepted tungsten instead of wolfram in deference to North American usage; and niobium instead of columbium in deference to European usage. While many US chemical societies and government organizations typically use the official IUPAC name, some metallurgists and metal societies still use the original American name, "columbium".
Document 8: 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 9: 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 10: Sial: The name 'sial' was taken from the first two letters of silica and of alumina. The sial is often contrasted to the 'sima,' the next lower layer in the Earth, which is often exposed in the ocean basins; and the nickel - iron alloy core, sometimes referred to as the ``Nife ''. These geochemical divisions of the Earth's interior (with these names) were first proposed by Eduard Suess in the 19th century. This model of the outer layers of the earth has been confirmed by petrographic, gravimetric, and seismic evidence.
Document 11: Agbaja mine: The Agbaja mine is a large iron mine located in central Nigeria in the Kogi State. Agbaja represents one of the largest iron ore reserves in Nigeria and in the world having estimated reserves of 1.25 billion tonnes of ore grading 48% iron metal.
Document 12: 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 13: 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 14: 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 15: 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.
ground_truth: Niger River
sub_queries: Who is the Ferronigerite-2N1S named after? Answer: Nigeria
The Nigeria was named for whom? Answer: Niger River