question: Who is the maternal grandfather of Princess Elisabeth Of Saxe-Altenburg (1826–1896)?
context: [["Ernst I, Duke of Saxe-Altenburg", ["Ernst I, Duke of Saxe- Altenburg( German: Ernst I. Friedrich Paul Georg Nikolaus von Sachsen- Altenburg)( 16 September 1826 in Hildburghausen \u2013 7 February 1908 in Altenburg), was a duke of Saxe- Altenburg.", "He was the first son of Georg, Duke of Saxe- Altenburg and Marie Luise of Mecklenburg- Schwerin.", "In 1853 he succeeded his father as Duke of Saxe- Altenburg.", "He was of a retiring disposition and he took little active part in running the country.", "After a reign that lasted fifty five years, he died without a living direct male heir; because of this, he was succeeded by his nephew, Ernst."]], ["Princess Elisabeth Sophie of Saxe-Altenburg", ["Elisabeth Sophie of Saxe- Altenburg( 10 October 1619 \u2013 20 December 1680), was a princess of Saxe- Altenburg and, by marriage, duchess of Saxe- Gotha.", "She was born in Halle, the only daughter of Johann Philipp, Duke of Saxe- Altenburg, and his wife, Elisabeth of Brunswick- Wolfenb\u00fcttel."]], ["Prince Eduard of Saxe-Altenburg", ["Eduard Karl Wilhelm Christian of Saxe- Altenburg( Hildburghausen, 3 July 1804 \u2013 Munich, 16 May 1852), was a German prince of the ducal house of Saxe- Hildburghausen( of Saxe- Altenburg from 1826)."]], ["Prince Moritz of Saxe-Altenburg", ["Prince Moritz Franz Friedrich Constantin Alexander Heinrich August Carl Albrecht of Saxe- Altenburg( 24 October 1829 in Eisenberg \u2013 13 May 1907 in Arco, Italy), was a member of the ducal house of Saxe- Altenburg.", "He was the father of Ernst II, Duke of Saxe- Altenburg."]], ["Princess Antoinette of Saxe-Altenburg", ["Princess Antoinette of Saxe- Altenburg( 17 April 1838 \u2013 13 October 1908) was a princess of Saxe- Altenburg by birth and Duchess of Anhalt by marriage."]], ["Princess Elisabeth of Saxe-Altenburg (1826\u20131896)", ["Princess Elisabeth Pauline Alexandrine of Saxe-Altenburg (26 March 1826 \u2013 2 February 1896) was a daughter of Joseph, Duke of Saxe-Altenburg and his wife Duchess Amelia of W\u00fcrttemberg.", "By marriage, she became Grand Duchess of Oldenburg."]], ["Duchess Amelia of W\u00fcrttemberg", ["Amalie Therese Louise Wilhelmina Philippine of W\u00fcrttemberg (28 June 1799 \u2013 28 November 1848) was a Duchess of W\u00fcrttemberg and an ancestor of Greek, Romanian, Yugoslavian and Spanish Royal Families.", "She was a daughter of Duke Louis of W\u00fcrttemberg and Princess Henrietta of Nassau-Weilburg."]], ["Georg Moritz, Hereditary Prince of Saxe-Altenburg", ["George Moritz, Hereditary Prince of Saxe- Altenburg(\" William George Moritz Ernest Albert Frederick Charles Constantine Edward Maximilian\"; 13 May 1900 \u2013 13 February 1991), was the last head of the ducal house of Saxe- Altenburg and nominal Duke of Saxe- Altenburg.", "He devoted much of his life to promote anthroposophy."]], ["Princess Marie Anne of Saxe-Altenburg", ["Princess Marie Anne of Saxe- Altenburg( 14 March 1864 \u2013 3 May 1918) was the consort of Georg, Prince of Schaumburg- Lippe.", "As the eldest daughter of Prince Moritz of Saxe- Altenburg and his wife Princess Augusta of Saxe- Meiningen, and a sister of Ernest II, Duke of Saxe- Altenburg, Marie Anne was a member of the Ducal House of Saxe- Altenburg."]], ["Princess Charlotte of Saxe-Altenburg", ["Princess Charlotte Agnes of Saxe- Altenburg( 4 March 189916 February 1989) was the eldest child of Ernst II, the last reigning duke of Saxe- Altenburg."]]]
supporting_facts: [["Princess Elisabeth of Saxe-Altenburg (1826\u20131896)", 0], ["Duchess Amelia of W\u00fcrttemberg", 1]]
evidences: [["Princess Elisabeth of Saxe-Altenburg (1826\u20131896)", "mother", "Duchess Amelia of W\u00fcrttemberg"], ["Duchess Amelia of W\u00fcrttemberg", "father", "Duke Louis of W\u00fcrttemberg"]]
answer: Duke Louis of Württemberg