question: Who is the maternal grandfather of Amadeus Vii, Count Of Savoy?
context: [["Amadeus VII, Count of Savoy", ["Amadeus VII (March 1360, Chamb\u00e9ry \u2013 1 November 1391), known as the Red Count, was Count of Savoy from 1383 to 1391.", "Amadeus was the son of Amadeus VI, Count of Savoy and Bonne of Bourbon.", "Amadeus VII was known for his hospitality, for he would entertain people of all stations and never turned a person from his table without a meal.", "He married Bonne of Berry, daughter of John, Duke of Berry, who was the younger brother of Charles V of France.", "They had three children:\nUpon his death at age 29 from tetanus, controversy arose because of his will.", "Amadeus VII left the important role of guardian of his son and heir, Amadeus VIII, to his own mother, a sister of the powerful Duke de Bourbon, instead of following the tradition of appointing the child's mother, who was a daughter of the equally powerful Duke de Berry.", "It took three months of negotiations to restore peace in the family."]], ["Amadeus VIII, Duke of Savoy", ["Amadeus VIII( 4 September 1383 \u2013 7 January 1451) was a Savoyard nobleman, the son of Amadeus VII, Count of Savoy and Bonne of Berry.", "He was surnamed the Peaceful.", "After the death of his father in 1391, his mother acted as a regent, because of his youth.", "He was an antipope of the Catholic Church from 1439 to 1449 as Felix V, in opposition to Popes Eugene IV and Nicholas V."]], ["Beatrice of Viennois", ["Beatrice of Vienne( 1160 \u20131230) was a Countess of Savoy by marriage to Humbert III, Count of Savoy."]], ["Yolande Louise of Savoy", ["Yolande Louise of Savoy( 1487\u20131499), was a Duchess Consort of Savoy; married to Philibert II, Duke of Savoy."]], ["Joan of Geneva", ["Joan of Geneva( born c. 1040, died 1095) was a Countess Consort of Savoy; married to Amadeus II, Count of Savoy.", "According to the much later\" Chronicles of Savoy\", Amadeus married Joan, daughter of\" Girard, Count of Burgundy\", which scholars have surmised to have been Count Gerold of Geneva.", "The\" Chronicon Altacumbae\" says only that\" the wife of Amadeus[ was] from Burgundy\", which might refer to Amadeus I.", "If his wife were Genevan, it would explain how the house of Savoy came so early to possess a large portion of the Genevois.", "His wife, whatever her name and origins, bore Amadeus II several children, although there is some uncertainty about how many:"]], ["Humbert II, Count of Savoy", ["Umberto II, nicknamed the Fat( 1065, Carignano, Piedmont \u2013 19 October 1103), was Count of Savoy from 1080 until his death in 1103.", "He was the son of Amadeus II of Savoy.", "He was married to Gisela of Burgundy, daughter of William I, Count of Burgundy, and had 7 children:"]], ["Cecile of Baux", ["Cecile of Baux( 1230 \u2013 1275), was a Countess Consort of Savoy; married in 1244 to Amadeus IV, Count of Savoy.", "She was the daughter of Barral of Baux and his wife, Sibylle d'Anduze.", "She was the Regent of Savoy during the minority of her son, Boniface, Count of Savoy, from 1253 until 1259."]], ["Louis of Piedmont", ["Louis( 1364 \u2013 11 December 1418) was the Lord of Piedmont and titular Prince of Achaea from 1402.", "He was a son of James of Piedmont and Marguerite de Beaujeu( 1346 \u2013 1402).", "In 1405, he founded the University of Turin.", "On 24 January 1403, he married Bona( 1388 \u2013 1432), daughter of Amadeus VII, Count of Savoy, but they never had any children.", "When he died in 1418, the Piedmont- Achaea cadet branch of the House of Savoy died with him.", "His titles and estates were inherited by the senior line of the House of Savoy."]], ["Bonne of Bourbon", ["Bonne of Bourbon (1341 \u2013 19 January 1402) was a daughter of Peter I, Duke of Bourbon, and Isabella of Valois, and hence a sister of Joanna of Bourbon.", "She served as regent of Savoy during the absence of her spouse from 1366 to 1367, in 1383, and during the minority of her grandson Count Amadeus VIII in 1391."]], ["Marie of Savoy, Duchess of Milan", ["Marie of Savoy( 1411\u20131469) was a daughter of Amadeus VIII, Duke of Savoy( later the Antipope Felix V) and Mary of Burgundy.", "She married Filippo Maria Visconti, the Duke of Milan in 1428.", "They had no children."]]]
supporting_facts: [["Amadeus VII, Count of Savoy", 1], ["Bonne of Bourbon", 0]]
evidences: [["Amadeus VII, Count of Savoy", "mother", "Bonne of Bourbon"], ["Bonne of Bourbon", "father", "Peter I"]]
answer: Peter I