question: Who is the maternal grandfather of Princess Helena Adelaide Of Schleswig-Holstein-Sonderburg-Glücksburg?
context: [["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."]], ["Prince Albert of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", ["Prince Albert of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg( 15 March 1863, Kiel, Duchy of Holstein \u2013 23 April 1948, Gl\u00fccksburg, Schleswig- Holstein, Germany) was the fifth and youngest child of Friedrich, Duke of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg and his wife Princess Adelheid of Schaumburg- Lippe and was a nephew of Christian IX of Denmark.", "Albert was the grandfather of Ernst August, Prince of Hanover through his daughter Princess Ortrud of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg.", "Albert was recognized by a family compact of 1904 as possessing rights of succession to the Grand Duchy of Oldenburg in the event of the extinction of the reigning Grand Ducal line."]], ["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 Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg", ["Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg (25 January 1860, in Augustenborg, Jutland, Denmark \u2013 20 February 1932, in Gr\u00fcnholz, Province of Schleswig-Holstein, Free State of Prussia, Weimar Republic) was the second-eldest daughter of Frederick VIII, Duke of Schleswig-Holstein and his wife Princess Adelheid of Hohenlohe-Langenburg."]], ["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."]], ["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"]], ["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."]], ["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."]], ["Count Oluf of Rosenborg", ["Oluf, Count of Rosenborg", "( Oluf Christian Carl Axel; 10 March 1923 \u2013 19 December 1990), a former Danish prince, was the younger child and son of Prince Harald of Denmark by his wife, Princess Helena Adelaide of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg."]], ["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."]]]
supporting_facts: [["Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", 0], ["Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg", 0]]
evidences: [["Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Gl\u00fccksburg", "mother", "Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg"], ["Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg", "father", "Frederick VIII, Duke of Schleswig-Holstein"]]
answer: Frederick VIII, Duke of Schleswig-Holstein