question: Who is the paternal grandfather of Rudolf Of Żagań?
context: [["Bertha of Rheinfelden", ["Bertha of Rheinfelden( also Bertha of Bregenz)( b.c. 1065; d. after 1128), countess of Kellm\u00fcnz, was the daughter of Rudolf of Rheinfelden and wife of Ulrich X of Bregenz."]], ["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."]], ["Wenceslaus of \u017baga\u0144", ["Wenceslaus of \u017baga\u0144( ca. 1434 \u2013 29 April 1488) was a Duke of \u017baga\u0144- Przew\u00f3z since 1439( with his brothers as co-rulers until 1449), from 1449 Duke of Przew\u00f3z( as co-ruler of his younger brother).", "He was the third son of Duke Jan I of \u017baga\u0144 by his wife Scholastika, daughter of Rudolf III, Duke of Saxe- Wittemberg and Elector of Saxony.", "His uncle, Joe II of \u017baga\u0144, was his guiding mentor through childhood."]], ["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."]], ["Rudolf of \u017baga\u0144", ["Rudolf of \u017baga\u0144  (ca. 1418 \u2013 18 September 1454) was a Duke of \u017baga\u0144-Przew\u00f3z since 1439 (with his brothers as co-rulers until 1449), from 1449 Duke of \u017baga\u0144 (as co-ruler of his older brother).", "He was the second son of Duke Jan I of \u017baga\u0144 by his wife Scholastika, daughter of Rudolf III, Duke of Saxe-Wittemberg and Elector of Saxony.", "He was named after his maternal grandfather."]], ["Balthasar of \u017baga\u0144", ["Balthasar, Duke of \u017baga\u0144( \u2013 Przew\u00f3z, 15 July 1472), was a Duke of \u017baga\u0144- Przew\u00f3z since 1439( with his brothers as co-rulers until 1449), from 1449 Duke of \u017baga\u0144.", "Deposed during 1461 \u2013 1468, he recovered the Duchy in this year until shortly before his death.", "He was the oldest son of Duke Jan I of \u017baga\u0144 by his wife Scholastika, daughter of Rudolf III, Duke of Saxe- Wittemberg and Elector of Saxony.", "He was named after his maternal great- grandfather, Balthasar, Landgrave of Thuringia( Scholastika's maternal grandfather)."]], ["Jan II the Mad", ["Jan II the Mad also known as the Bad, the Wild or the Cruel( 16 April 1435 \u2013 22 September 1504), was a Duke of \u017baga\u0144- Przew\u00f3z since 1439( with his brothers as co-rulers until 1449), from 1449 Duke of Przew\u00f3z( as co-ruler of his younger brother), during 1461 \u2013 1468 and briefly in 1472 Duke of \u017baga\u0144 and during 1476 \u2013 1488 Duke of half- G\u0142og\u00f3w( the Duchy was finally reunited in 1480).", "He was the fourth and youngest son of Duke Jan I of \u017baga\u0144 by his wife Scholastika, daughter of Rudolf III, Duke of Saxe- Wittenberg and Elector of Saxony."]], ["Jan I of \u017baga\u0144", ["Jan I of \u017baga\u0144  (\u2013 12 April 1439) was a Duke of \u017baga\u0144-G\u0142og\u00f3w, since 1397 (until 1412 with his brothers as co-rulers), since 1403 Duke of \u017baga\u0144, Krosno Odrza\u0144skie and \u015awiebodzin (again, until 1412 with his brothers as co-rulers) and since 1412 sole ruler of \u017baga\u0144 and Przew\u00f3z.", "He was the eldest son of Henry VIII the Sparrow, Duke of G\u0142og\u00f3w by his wife Katharina, daughter of Duke W\u0142adys\u0142aw of Opole."]], ["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"]], ["Agnes of Rheinfelden", ["Agnes of Rheinfelden(*; \u2020 19 December 1111) was the daughter of Rudolf of Rheinfelden, and the wife of Berthold II of Z\u00e4hringen."]]]
supporting_facts: [["Rudolf of \u017baga\u0144", 1], ["Jan I of \u017baga\u0144", 1]]
evidences: [["Rudolf of \u017baga\u0144", "father", "Jan I of \u017baga\u0144"], ["Jan I of \u017baga\u0144", "father", "Henry VIII the Sparrow"]]
answer: Henry VIII the Sparrow