question: Who is the paternal grandmother of Shiban?
context: [["Shiban", ["Shiban (Sheiban) or Shayban (\"Shiban\") was a prince of the early Golden Horde.", "He was a grandson of Genghis Khan, the fifth son of Jochi and a younger brother Batu Khan who founded the Golden Horde.", "His descendants were the Shaybanids who became important about two centuries later."]], ["Jochi", ["Jochi (also spelled Djochi, J\u00f6chi and Juchi; c. 1182\u2013 February 1227) was a Mongolian army commander who was the eldest son of Genghis Khan, and presumably one of the four sons by his principal wife B\u00f6rte, though issues concerning his paternity followed him throughout his life.", "An accomplished military leader, he participated in his father's conquest of Central Asia, along with his brothers and uncles."]], ["G\u00fclbahar Hatun (wife of Mehmed II)", ["G\u00fclbahar Hatun( 1432 \u2013 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I."]], ["Tjuyu", ["Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.", "She is the grandmother of Akhenaten, and great grandmother of Tutankhamun."]], ["H\u00fcma Hatun", ["H\u00fcma Hatun (1410 \u2012 September 1449) was the fourth wife of Ottoman Sultan Murad II and mother of Mehmed II and the grandmother of Bayezid II."]], ["Hannah Arnold", ["Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children."]], ["Kaoru Hatoyama", ["After the elections of 2009, she became more widely known as the grandmother of Prime Minister Yukio Hatoyama and his politician brother Kunio Hatoyama."]], ["Hubba bint Hulail", ["Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic\" Nab\u012b\"( Prophet) Muhammad ibn Abdullah."]], ["Mona Hopton Bell", ["Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.", "She was the grandmother of the painter Jean H. Bell."]], ["Anne Denman", ["Anne Denman( 1587\u20131661) was born in Olde Hall, Retford, Nottinghamshire.", "Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne."]]]
supporting_facts: [["Shiban", 1], ["Jochi", 0]]
evidences: [["Shiban", "father", "Jochi"], ["Jochi", "mother", "B\u00f6rte"]]
answer: Börte