question: Who is Helena Of Oświęcim's paternal grandfather?
context: [["Jan III of O\u015bwi\u0119cim", ["Jan III of O\u015bwi\u0119cim( 1366 \u2013 by 19 August 1405) was a Duke of O\u015bwi\u0119cim since 1376 until his death.", "He was the eldest child and only son of Duke Jan II of O\u015bwi\u0119cim by his wife Hedwig, daughter of Ludwik I the Fair, Duke of Brzeg.", "Initially, historians thought that Dukes Jan II and Jan III are the same person, until the discovery of further sources who confirmed Jan III's existence."]], ["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."]], ["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"]], ["Jan IV of O\u015bwi\u0119cim", ["Jan IV of O\u015bwi\u0119cim (1426/1430 \u2013 by 21 February 1497), was a Duke of O\u015bwi\u0119cim during 1434\u20131456 (until 1445 with his brothers as co-rulers) and Duke of Gliwice from 1465 to 1482.", "He was the third son of Duke Casimir I of O\u015bwi\u0119cim by his first wife Anna, daughter of Duke Henry VIII of \u017baga\u0144."]], ["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."]], ["Casimir I of O\u015bwi\u0119cim", ["Casimir I of O\u015bwi\u0119cim( 1396 \u2013 7 April 1434) was a Duke of O\u015bwi\u0119cim since 1406( under regency until 1414), ruler over Toszek( from 1414) and Strzelin( during 1416 \u2013 1427).", "He was the only child of Duke Przemys\u0142aw of O\u015bwi\u0119cim by his unknown wife."]], ["Jan I the Scholastic", ["Jan I the Scholastic( 1308 /10 \u2013 1372 before 29 September), was a Duke of O\u015bwi\u0119cim from 1324 until his death.", "He was the eldest child and only son of Duke W\u0142adys\u0142aw of O\u015bwi\u0119cim by his wife Euphrosyne, daughter of Duke Boleslaus II of Masovia."]], ["Jan II of O\u015bwi\u0119cim", ["Jan II of O\u015bwi\u0119cim( \u2013 19 February 1376) was a Duke of O\u015bwi\u0119cim since 1372 until his death.", "He was the only son of Jan I the Scholastic, Duke of O\u015bwi\u0119cim, by his unknown first wife."]], ["W\u0142adys\u0142aw of O\u015bwi\u0119cim", ["W\u0142adys\u0142aw of O\u015bwi\u0119cim( 1275/80 \u2013 by 15 May 1324), was a Duke of O\u015bwi\u0119cim from 1315 until his death.", "He was the eldest son of Mieszko I, Duke of Cieszyn by his wife, probably called Grzymis\u0142awa."]], ["Helena of O\u015bwi\u0119cim", ["Helena of O\u015bwi\u0119cim (1478/80 \u2013 after 1524), was a Polish princess member of the House of Piast from the O\u015bwi\u0119cim branch and ruling Duchess of Karni\u00f3w since 1506 until 1523.", "She was the only child of Duke Jan IV of O\u015bwi\u0119cim by his second wife Barbara, daughter of Duke Nicholas V of Karni\u00f3w."]]]
supporting_facts: [["Helena of O\u015bwi\u0119cim", 1], ["Jan IV of O\u015bwi\u0119cim", 1]]
evidences: [["Helena of O\u015bwi\u0119cim", "father", "Jan IV of O\u015bwi\u0119cim"], ["Jan IV of O\u015bwi\u0119cim", "father", "Casimir I of O\u015bwi\u0119cim"]]
answer: Casimir I of Oświęcim