question: Who is the maternal grandfather of Irmgard Of Chiemsee?
context: [["Henry Krause", ["Henry J.\" Red\" Krause, Jr.( August 28, 1913 \u2013 February 20, 1987) was an American football offensive lineman in the National Football League for the Brooklyn Dodgers and the Washington Redskins.", "He played college football at St. Louis University.", "He is the grandfather of Jennifer Krause", "He is the great grandfather of Payton Hoeing"]], ["Berthold of Chiemsee", ["Berthold of Chiemsee( 1465 \u2013 19 July 1543) was a German bishop and theological writer."]], ["John Westley", ["Rev. John Westley( 1636 \u2013 78) was an English nonconformist minister.", "He was the grandfather of John Wesley( founder of Methodism)."]], ["Irmgard of Chiemsee", ["Blessed Irmgard of Chiemsee (also \"Irmengard\"; \u2013 16 July 866), a member of the Carolingian dynasty, was the second daughter of King Louis the German and his wife Hemma.", "She was the first Abbess of Frauenchiemsee from 857 until her death."]], ["Lyon Cohen", ["Lyon Cohen( 1868\u20131937) was a Polish- born Canadian businessman and a philanthropist.", "He was the grandfather of singer/ poet Leonard Cohen."]], ["Fred Le Deux", ["Frederick\" Fred\" Le Deux( born 4 December 1934) was an Australian rules footballer who played with Geelong in the Victorian Football League( VFL).", "He is the grandfather of Tom Hawkins."]], ["Hemma", ["Emma of Altdorf, also known as Hemma (\u2013 31 January 876), a member of the Elder House of Welf, was Queen consort of East Francia by marriage to King Louis the German, from 843 until her death."]], ["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."]], ["Abd al-Muttalib", ["Abd al- Muttalib Shaybah ibn Hashim( c. 497 \u2013 578) was the grandfather of Islamic prophet Muhammad."]], ["Zhao Shoushan", ["Zhao Shoushan( 12 November 1894 \u2013 20 June 1965) was a KMT general and later Chinese Communist Party politician.", "He is the grandfather of Zhao Leji."]]]
supporting_facts: [["Irmgard of Chiemsee", 0], ["Hemma", 0]]
evidences: [["Irmgard of Chiemsee", "mother", "Hemma"], ["Hemma", "father", "Welf"]]
answer: Welf