question: When was Albert, Duke Of Schleswig-Holstein's father born?
context: [["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."]], ["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."]], ["Joachim Ernest, Duke of Schleswig-Holstein-Sonderburg-Pl\u00f6n", ["Joachim Ernest of Schleswig-Holstein- Sonderburg- Pl\u00f6n( 29 August 1595 \u2013 October 5, 1671), also\" Joachim Ernest of Schleswig- Holstein- Pl\u00f6n\", was the first Duke of Schleswig- Holstein- Sonderburg- Pl\u00f6n, which emerged from a division of the Duchy of Schleswig- Holstein- Sonderburg."]], ["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 Christian of Schleswig-Holstein", ["Prince Christian of Schleswig-Holstein (Frederick Christian Charles Augustus; 22 January 1831 \u2013 28 October 1917) was a minor Danish-born German prince who became a member of the British Royal Family through his marriage to Princess Helena of the United Kingdom, the fifth child and third daughter of Queen Victoria and Prince Albert of Saxe-Coburg-Gotha."]], ["Joachim Frederick, Duke of Schleswig-Holstein-Sonderburg-Pl\u00f6n", ["Joachim Frederick of Schleswig-Holstein- Sonderburg- Pl\u00f6n( 9 May 1668, Magdeburg \u2013 25 January 1722, Pl\u00f6n), also known as Joachim Frederick of Schleswig- Holstein- Pl\u00f6n, was the third Duke of Schleswig- Holstein- Pl\u00f6n, a dukedom created by the division of the Duchy of Schleswig- Holstein- Sonderburg."]], ["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."]], ["Albert, Duke of Schleswig-Holstein", ["Albert, Duke of Schleswig-Holstein (Albert John Charles Frederick Alfred George; 26 February 1869 \u2013 27 April 1931), was a grandson of Queen Victoria.", "He was the second son of Victoria's daughter, Princess Helena, by her husband Prince Christian of Schleswig-Holstein.", "He was the head of the House of Oldenburg and also the House of Schleswig-Holstein-Sonderburg-Augustenburg and the Duke of Schleswig-Holstein between 1921 and 1931."]], ["Princess Marie Alexandra of Schleswig-Holstein", ["Princess Marie Alexandra of Schleswig-Holstein -Sonderburg- Gl\u00fccksburg, since 1941 of Schleswig- Holstein( Marie Alexandra Caroline- Mathilde Viktoria Irene; 9 July 1927, Schloss Louisenlund, Schleswig, Schleswig- Holstein, Germany \u2013 14 December 2000, Friedrichshafen, Baden- W\u00fcrttemberg, Germany) was a member of the House of Schleswig- Holstein- Sonderburg- Gl\u00fccksburg.", "Marie Alexandra was the fourth and youngest child of Wilhelm Friedrich, Duke of Schleswig- Holstein and his wife Princess Marie Melita of Hohenlohe- Langenburg.", "Her older brother Peter was the Duke of Schleswig- Holstein and Head of the House of Oldenburg from 10 February 1965 until his death on 30 September 1980."]], ["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."]]]
supporting_facts: [["Albert, Duke of Schleswig-Holstein", 1], ["Prince Christian of Schleswig-Holstein", 0]]
evidences: [["Albert, Duke of Schleswig-Holstein", "father", "Prince Christian of Schleswig-Holstein"], ["Prince Christian of Schleswig-Holstein", "date of birth", "22 January 1831"]]
answer: 22 January 1831