question: What nationality is Sonni Baru's father?
context: [["Ali Rahuma", ["Ali Khalifa Rahuma( born May 16, 1982) is a Libyan football midfielder who's nationality is Libyan.", "He currently plays for Al- Ittihad, and is a member of the Libya national football team."]], ["Fulco", ["Fulco was the first known missionary Bishop of Estonia.", "He was appointed in 1165 by Eskil, the Danish Archbishop of Lund.", "Before his appointment, Fulco was a Benedictine monk in the abbey of Moutier- la- Celle, near Troyes in France.", "His nationality is not known.", "After his appointment, Fulco appears in sources only once.", "In 1171, Pope Alexander III asked the Archbishop of Trondheim to assign an Estonian monk Nicolaus living in Stavanger to go to Fulco's assistance.", "No further information survives about Fulco's work in Estonia, or whether he ever even got there."]], ["Roberto Savio", ["Roberto Savio( born in Rome, Italy, but also holding Argentine nationality) is a journalist, communication expert, political commentator, activist for social and climate justice and advocate of global governance.", "He has spent most of his career with Inter Press Service( IPS), the news agency which he founded in 1964 along with Argentine journalist Pablo Piacentini.", "Savio studied Economics at the University of Parma, followed by post -graduate courses in Development Economics under Gunnar Myrdal, History of Art and International Law in Rome.", "He started his professional career as a research assistant in International Law at the University of Parma."]], ["Nayelly Hern\u00e1ndez", ["Nayelly Hern\u00e1ndez( born 23 February 1986) is a former Mexican female professional squash player.", "She has represented Mexico internationally in several international competitions including the Central American and Caribbean Games, Pan American Games, Women's World Team Squash Championships.", "Nayelly achieved her highest career ranking of 57 in October 2011 during the 2011 PSA World Tour.", "Her husband Chris Walker whose nationality is English is also a professional squash player.", "She joined the Trinity College in 2008 as the first Mexican female to join a US college for squash and graduated in 2010."]], ["Baglan Mailybayev", ["Baglan Mailybayev( in Kazakh \u0411\u0430\u0493\u043b\u0430\u043d \u0410\u0441\u0430\u0443\u0431\u0430\u0439\u04b1\u043b\u044b \u041c\u0430\u0439\u043b\u044b\u0431\u0430\u0435\u0432) was born on 20 May 1975 in Zhambyl region, Kazakhstan.", "His nationality is Kazakh.", "He is a politician of the Republic of Kazakhstan, Deputy Head of the Presidential Administration of the Republic of Kazakhstan, Doctor of Law( 2002)( under the supervision of Professor Zimanov S.Z.- scientific advisor and academician of National Academy of Sciences of the Republic of Kazakhstan) and Ph.D. in Political Science( 1998)."]], ["Eleni Gabre-Madhin", ["Eleni Zaude Gabre- Madhin, an Ethiopian economist with Swiss nationality, is a former Chief Executive Officer of the Ethiopia Commodity Exchange( ECX).", "She has had many years of experience working on agricultural markets \u2013 particularly in Sub- Saharan Africa \u2013 and has held senior positions in the World Bank, the International Food Policy Research Institute( Washington), and United Nations( Geneva)."]], ["Sonni Ali", ["Sunni Ali, also known as Sunni Ali Ber, was born in Ali Kolon.", "He reigned from about 1464 to 1492.", "Sunni Ali was the first king of the Songhai Empire, located in Africa and the 15th ruler of the Sunni dynasty.", "Under Sunni Ali's infantry and cavalry", "many cities were captured and then fortified, such as Timbuktu (captured in 1468) and Djenn\u00e9 (captured in 1475).", "Sunni conducted a repressive policy against the scholars of Timbuktu, especially those of the Sankore region who were associated with the Tuareg whom Ali expelled to gain control of the town.", "Sunni Ali organized a fleet to the Niger river.", "During his reign, Songhai surpassed the height of the Mali Empire, engulfing areas under the Mali Empire (and the Ghana Empire before it).", "His death, in late 1492, is a matter of conjecture.", "According to the \"Tarikh al-Sudan\", Ali drowned while crossing the Niger River.", "Oral tradition believes he was killed by his sister's son, Askia Muhammad Ture.", "He was succeeded by his son, Sunni Baru, who was challenged by Askia because Baru was not seen as a faithful Muslim.", "Askia succeeded to the throne.", "According to the \"Tarikh al-Sudan\" it is believed that this action caused Sonni Ali's daughters to shout out \"A si kiya!\"", "a more modern phrasing would be \u201cA si tiya\u201d or (he shall not be it), at the news of this take over.", "Sunni Ali ruled over both urban Muslims and rural non-Muslims at a time when the traditional co-existence of different beliefs was being challenged.", "His adherence to African animism while also professing Islam leads some writers to describe him as \"outwardly\" or \"nominally\" Muslim."]], ["Khalid al-Habib", ["Khalid al- Habib also believed to use the nom de guerre Khalid al Harbi is an Al- Qaeda leader who has overseen Al- Qaeda operations in Afghanistan.", "In 2005 it was reported that al- Habib died in a US missile strike on the Pakistani village of Damadola though it is unclear whether this is the case as Pakistani officials have claimed that no Al- Qaeda leaders died in the attack.", "al- Habib's nationality is not clear with sources claiming he may be Egyptian or Moroccan."]], ["Sonni Baru", ["Sonni B\u0101ru, also known as Sonni Ab\u016b Bakr Dao was the 16th and last king of the Sonni Dynasty to rule over the Songhai Empire located in west Africa.", "His rule was very short, from November 1492 to April 1493.", "The dates of his birth and death are unknown.", "He succeeded his father Sonni Ali on the latter's death on 6 November 1492.", "However, one of Sonni Ali's generals, Muhammad Ture, plotted to take power.", "Baru was challenged by Muhammad because he was not seen as a faithful Muslim.", "As soon as he had made his arrangements, he attacked Sonni B\u0101ru on 18 February 1493.", "Sonni B\u0101ru's army was defeated.", "There was another, more decisive battle on 12 April 1493, after which Sonni B\u0101ru fled into exile.", "The usurper then took power as Askia Muhammad Ture."]], ["Rumbold of Mechelen", ["Saint Rumbold( or\" RumoldRomuold\") was an Irish or Scottish Christian missionary, although his true nationality is not known for certain.", "He was martyred near Mechelen by two men, whom he had denounced for their evil ways.", "Saint Rumbold's feast day is celebrated by the Roman Catholic Church, and Western Rite Orthodox Churches, on 24 June; and it is celebrated in Ireland on 3 July.", "He is the patron saint of Mechelen, where St. Rumbold's Cathedral possesses an elaborate golden shrine on its high altar, containing relics attributed to the saint.", "It is rumoured that his remains are buried inside the cathedral.", "Twenty- five paintings in the choir illustrate his life."]]]
supporting_facts: [["Sonni Baru", 3], ["Sonni Ali", 6]]
evidences: [["Sonni Baru", "father", "Sonni Ali"], ["Sonni Ali", "country of citizenship", "Niger"]]
answer: Niger