question: When did Karl, Duke Of Schleswig-Holstein-Sonderburg-Glücksburg's father die?
context: [["Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg (4 January 1785 \u2013 17 February 1831) inherited the title of Duke of Schleswig-Holstein-Sonderburg-Beck in 1816.", "He subsequently changed his title to Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg in 1825 and founded a line that includes the Royal Houses of Denmark, Greece, Norway, and the Commonwealth realms."]], ["Prince Julius of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Prince Julius of Schleswig-Holstein- Sonderburg- Gl\u00fccksburg( 14 October 1824, Gottorp, Schleswig, Duchy of Schleswig \u2013 1 June 1903, Itzehoe, Schleswig- Holstein, Germany) was the eighth of the ten children of Friedrich Wilhelm, Duke of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg and Princess Louise Caroline of Hesse- Kassel."]], ["Friedrich Ferdinand, Duke of Schleswig-Holstein", ["Friedrich Ferdinand of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg( 12 October 1855 \u2013 21 January 1934) was the fourth Duke of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg and became Duke of Schleswig- Holstein in 1931."]], ["Friedrich, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Friedrich of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg( 23 October 1814 in Schleswig, Duchy of Schleswig \u2013 27 November 1885 in Luisenlund, Schleswig- Holstein, Prussia) was the third Duke of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg.", "Friedrich was the second- eldest son of Friedrich Wilhelm, Duke of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg and Princess Louise Caroline of Hesse- Kassel and an elder brother of Christian IX of Denmark.", "Friedrich inherited the title of Duke of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg upon his childless brother Karl's death on 14 October 1878."]], ["Princess Alexandra Victoria of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Princess Alexandra Victoria of Schleswig-Holstein- Sonderburg- Gl\u00fccksburg( 21 April 1887 \u2013 15 April 1957) was a daughter of Friedrich Ferdinand, Duke of Schleswig- Holstein and his wife Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Augustenburg."]], ["Karl, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Karl of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg (30 September 1813 at Gottorp in Schleswig, Duchy of Schleswig \u2013 24 October 1878 at Luisenlund, Gl\u00fccksburg, in Schleswig-Holstein, Prussia) was the second Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg.", "Karl was the eldest son of Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg and Princess Louise Caroline of Hesse-Kassel and an elder brother of Christian IX of Denmark.", "Karl became Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg upon his father's death on 27 February 1831."]], ["Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Princess Helena Adelaide of Schleswig-Holstein- Sonderburg- Gl\u00fccksburg( 1 June 1888- 30 June 1962) was the third eldest daughter of Friedrich Ferdinand, Duke of Schleswig- Holstein and his wife Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Augustenburg.", "She was a princess of Denmark through her marriage within the House of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg to Prince Harald of Denmark.", "Princess Helena was a Nazi sympathiser during World War II and was after the war exiled from Denmark, but eventually allowed to return, where she died."]], ["Augusta of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Princess Augusta of Schleswig-Holstein- Sonderburg- Gl\u00fccksburg( 27 June 1633 \u2013 26 May 1701) was a Danish- German princess of the senior Gl\u00fccksburg line of the Duke of Schleswig- Holstein.", "She was the first Duchess of Augustenborg by marriage.", "Augustenborg palace, and as a consequence the nearby town, were named in honor of her.", "The great- granddaughter of king Christian III of Denmark, she was the third daughter, eighth by birth, of Philip, Duke of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg and Princess Sophia Hedwig of Saxe- Lauenburg.", "She was sister of Sophia Dorothea of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg"]], ["Wilhelm Friedrich, Duke of Schleswig-Holstein", ["Friedrich, Duke of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg, from 1934 Duke of Schleswig- Holstein( 23 August 1891 \u2013 10 February 1965), was the Duke of Schleswig- Holstein and Head of the House of Oldenburg from 21 January 1934 until his death on 10 February 1965."]], ["Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Princess Karoline Mathilde of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg( Viktoria- Irene Adelheid Auguste Alberta Feodora Karoline Mathilde of Schleswig -Holstein- Sonderburg- Gl\u00fccksburg; 11 May 1894 \u2013 28 January 1972) was a member of the House of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg and Princess of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg by birth and a member of the House of Solms Baruth and Countess of Solms Baruth through her marriage to Count Hans of Solms- Baruth."]]]
supporting_facts: [["Karl, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", 1], ["Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", 0]]
evidences: [["Karl of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", "father", "Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg"], ["Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", "date of death", "17 February 1831"]]
answer: 17 February 1831