question: Who is the maternal grandfather of Princess Marie Anne Of Saxe-Altenburg?
context: [["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 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."]], ["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."]], ["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)."]], ["Princess Marie of Hanover", ["Princess Marie of Hanover (2 December 1849 \u2013 4 June 1904) was the younger daughter of King George V of Hanover and of his wife, Princess Marie of Saxe-Altenburg."]], ["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."]], ["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 Augusta of Saxe-Meiningen", ["Princess Augusta Louise Adelaide Caroline Ida of Saxe-Meiningen (6 August 1843 \u2013 11 November 1919) was the daughter of Bernhard II, Duke of Saxe-Meiningen and his wife Princess Marie Frederica of Hesse-Kassel.", "She was the mother of Ernst II, Duke of Saxe-Altenburg."]]]
supporting_facts: [["Princess Marie Anne of Saxe-Altenburg", 1], ["Princess Augusta of Saxe-Meiningen", 0]]
evidences: [["Princess Marie Anne of Saxe-Altenburg", "mother", "Princess Augusta of Saxe-Meiningen"], ["Princess Augusta of Saxe-Meiningen", "father", "Bernhard II, Duke of Saxe-Meiningen"]]
answer: Bernhard II, Duke of Saxe-Meiningen