question: Who is Sancho Ramírez's maternal grandfather?
context: [["Sancho Ram\u00edrez, Count of Ribagorza", ["Sancho Ram\u00edrez (before 10431105/November 1110) was an illegitimate son of King Ramiro I of Aragon and Amu\u00f1a, the firstborn and brother of his namesake who would inherit the throne and reign as Sancho Ram\u00edrez."]], ["Sancho Ram\u00edrez", ["Sancho Ram\u00edrez (1042 \u2013 4 June, 1094) was King of Aragon from 1063 until 1094 and King of Pamplona from 1076 under the name of Sancho V .", "He was the eldest son of Ramiro I and Ermesinda of Bigorre.", "His father was the first king of Aragon and an illegitimate son of Sancho III of Pamplona.", "He inherited the Aragonese crown from his father in 1063.", "Sancho Ram\u00edrez was chosen king of Pamplona by Navarrese noblemen after Sancho IV was murdered by his siblings."]], ["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["Kaya Alp", ["Kaya Alp was, according to Ottoman tradition, the son of K\u0131z\u0131l Bu\u011fa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertu\u011frul, and the great grandfather of the Ottoman Empire founder, Osman I."]], ["Ramiro II of Aragon", ["Ramiro II( 24 April 1086 \u2013 16 August 1157), called the Monk, was King of Aragon from 1134 until withdrawing from public life in 1137( although he used the royal title until his death).", "He was the youngest son of Sancho Ram\u00edrez, King of Aragon and Navarre and Felicia of Roucy."]], ["Prithvipati Shah", ["Prithvipati Shah( ?\u20131716) was the king of the Gorkha Kingdom in the Indian subcontinent, present- day Nepal.", "He was the grandfather of Nara Bhupal Shah."]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["Ermesinda of Bigorre", ["Ermesinda of Bigorre", "(Aragonese: \"Ermisenda de Bigorra\"), born Gerberga or Gisberga (1015 \u2013 1 December 1049), was a Queen of Aragon, a daughter of Bernard-Roger, Count of Bigorre and his wife Garsenda, Heiress of Bigorre.", "She was a member of the House of Foix, the sister of Bernard II, Count of Bigorre, Roger I, Count of Foix, and perhaps of Stephanie who married Garc\u00eda S\u00e1nchez III of Navarre.", "Gerberga married on 22 August 1036 to King Ramiro I of Aragon.", "After her wedding Gerberga changed her name to Ermesinda.", "The couple were married for thirteen years, in which time her husband elevated himself from a vassal holding scattered lands around Jaca into a \"de facto\" ruler of pocket-kingdom spanning the former counties of Aragon, Sobrarbe and Ribagorza, and is thereby credited with being the first King of Aragon.", "They had the following children:", "All of Ermesinda's children lived to adulthood.", "She died on 1 December 1049 and she was buried at the Monastery of San Juan de la Pe\u00f1a.", "Her husband remarried four years later to Agnes."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["Talesa of Aragon", ["Talesa, Tal\u00e8se, Tal\u00e8ze, or Ataresa( died after 1136) was an Aragonese noblewoman and relative of the royal Jim\u00e9nez dynasty.", "She was the daughter of Sancho Ram\u00edrez, Count of Ribagorza, natural brother of King Sancho Ram\u00edrez of Aragon and Navarre.", "She married Gaston IV of B\u00e9arn and acted as regent of the viscounty of B\u00e9arn during his absences on Crusade in 1096- 1101, and after his death for their son in 1131- 1134."]]]
supporting_facts: [["Sancho Ram\u00edrez", 1], ["Ermesinda of Bigorre", 1]]
evidences: [["Sancho Ram\u00edrez", "mother", "Ermesinda of Bigorre"], ["Ermesinda of Bigorre", "father", "Bernard-Roger, Count of Bigorre"]]
answer: Bernard-Roger, Count of Bigorre