question: Who is Princess Luise Dorothea Of Prussia's maternal grandfather?
context: [["Princess Luise Dorothea of Saxe-Meiningen", ["Luise Dorothea of Saxe- Meiningen( 10 August 1710 \u2013 22 October 1767) was a member of German royalty.", "She was born in Meiningen, the daughter of Ernst Ludwig I, Duke of Saxe- Meiningen and Dorothea Marie of Saxe- Gotha.", "She was the wife of Frederick III, Duke of Saxe- Gotha- Altenburg."]], ["Dorothea of Denmark, Duchess of Prussia", ["Dorothea of Denmark (1 August 1504 \u2013 11 April 1547), was a Duchess of Prussia by marriage to Duke Albert, Duke of Prussia.", "She was the daughter of King Frederick I of Denmark and Anna of Brandenburg."]], ["Princess Charlotte of Prussia (1831\u20131855)", ["Princess Charlotte of Prussia( 21 June 1831 \u2013 30 March 1855), was by birth a Princess of Prussia and member of the House of Hohenzollern and by marriage Hereditary Princess of Saxe- Meiningen.", "She was the eldest child and daughter of Prince Albert of Prussia( younger son of Frederick William III of Prussia and Louise of Mecklenburg- Strelitz) and his first wife Princess Marianne of the Netherlands( daughter of William I of the Netherlands and Wilhelmine of Prussia)."]], ["Princess Luise of Anhalt-Bernburg", ["Princess Luise of Anhalt- Bernburg( 30 October 1799, Ballenstedt \u2013 9 December 1882, Eller, D\u00fcsseldorf) was a German Princess.", "As the daughter of Alexius Frederick Christian, Duke of Anhalt- Bernburg and his wife Marie Friederike of Hesse- Kassel, she was a Princess of Anhalt- Bernburg and member of the House of Ascania.", "By her 21 November 1817 marriage to Prince Frederick of Prussia she was a princess of Prussia.", "She had two children: Prince Alexander of Prussia( 21 June 1820, Berlin \u2013 4 January 1896, Berlin) and Prince George of Prussia( 12 February 1826, D\u00fcsseldorf \u2013 2 May 1902, Berlin)."]], ["Anna Amalia, Abbess of Quedlinburg", ["Princess Anna Amalia of Prussia (9 November 1723 \u2013 30 March 1787) was Princess-Abbess of Quedlinburg.", "She was one of ten surviving children of King Frederick William I of Prussia and Sophia Dorothea of Hanover."]], ["Princess Friederike Luise of Prussia", ["Princess Friederike Luise of Prussia( 29 August 1714 \u2013 4 February 1784) was a daughter of Frederick William I of Prussia and Sophia Dorothea of Hanover and Margravine of Brandenburg- Ansbach."]], ["Prince Alexander of Prussia", ["Prince Friedrich Wilhelm Ludwig\" Alexander\" of Prussia( 21 June 1820 \u2013 4 January 1896) was the eldest child of Prince Frederick of Prussia and his wife, Princess Luise of Anhalt- Bernburg."]], ["Princess Luise Dorothea of Prussia", ["Princess Luise Dorothea of Prussia (Luise Dorothea Sophie; 29 September 1680 \u2013 23 December 1705) was Hereditary Princess of Hesse-Kassel by marriage to Frederick, Hereditary Prince of Hesse-Kassel.", "She was the daughter of Frederick I, First King in Prussia by his first wife Elisabeth Henriette of Hesse-Kassel.", "She died in childbirth."]], ["Elisabeth Henriette of Hesse-Kassel", ["Landgravine Elisabeth Henri\u00ebtte of Hesse-Kassel (18 November 1661 \u2013 7 July 1683) was the daughter of William VI, Landgrave of Hesse-Kassel and Hedwig Sophia of Brandenburg (1623\u20131683) a sister of Elector Frederick William of Brandenburg."]], ["Princess Sophia Dorothea of Prussia", ["Princess Sophia Dorothea of Prussia  (25 January 1719 \u2013 13 November 1765) was the ninth child and fifth daughter of Frederick William I of Prussia and Sophia Dorothea of Hanover.", "By marriage, she was a Margravine of Brandenburg-Schwedt."]]]
supporting_facts: [["Princess Luise Dorothea of Prussia", 1], ["Elisabeth Henriette of Hesse-Kassel", 0]]
evidences: [["Princess Luise Dorothea of Prussia", "mother", "Elisabeth Henriette of Hesse-Kassel"], ["Elisabeth Henriette of Hesse-Kassel", "father", "William VI, Landgrave of Hesse-Kassel"]]
answer: William VI, Landgrave of Hesse-Kassel