question: Who is Duchess Marie Louise Of Mecklenburg-Schwerin's paternal grandfather?
context: [["Duchess Marie Louise of Mecklenburg-Schwerin", ["Duchess Marie Louise of Mecklenburg-Schwerin (31 March 180326 October 1862) was daughter of Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin and consort of Georg, Duke of Saxe-Altenburg."]], ["Christian Louis I, Duke of Mecklenburg", ["Christian Louis I, Duke of Mecklenburg- Schwerin( 1 December 1623 in Schwerin \u2013 21 June 1692 in The Hague) was a reigning Duke of Mecklenburg- Schwerin."]], ["Duchess Louise Charlotte of Mecklenburg-Schwerin", ["Duchess Louise Charlotte of Mecklenburg- Schwerin( 19 November 1779 \u2013 4 January 1801) was the maternal grandmother of Prince Albert, husband of Queen Victoria of the United Kingdom.", "Louise Charlotte was born Duchess of Mecklenburg- Schwerin, her father being Friedrich Franz I, Grand Duke of Mecklenburg- Schwerin.", "Her mother was Princess Louise of Saxe- Gotha- Altenburg; her sister Charlotte of Mecklenburg- Schwerin( 1784\u20131840) married King Christian VIII of Denmark."]], ["Karin Elisabeth von Schaper", ["Karin Elisabeth, Hereditary Grand Duchess of Mecklenburg- Schwerin( n\u00e9e\" von Schaper\", Karin Elisabeth Henriette Lori Gudela; 31 January 1920 \u2013 26 January 2012) was a member by marriage of the House of Mecklenburg- Schwerin.", "She was the widow of Friedrich Franz, Hereditary Grand Duke of Mecklenburg- Schwerin."]], ["Friedrich Franz, Hereditary Grand Duke of Mecklenburg-Schwerin", ["Friedrich Franz, Hereditary Grand Duke of Mecklenburg- Schwerin( 22 April 1910 \u2013 31 July 2001) was the heir apparent to the throne of Mecklenburg- Schwerin and a member of the Waffen- SS."]], ["Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin", ["Frederick Louis of Mecklenburg-Schwerin (13 June 1778 \u2013 29 November 1819) was a hereditary prince of the Grand Duchy of Mecklenburg-Schwerin, one of the constituent states of the German Confederation.", "He was the son of Frederick Francis I, Grand Duke of Mecklenburg-Schwerin, and of Princess Louise of Saxe-Gotha-Altenburg."]], ["Magnus II, Duke of Mecklenburg", ["Magnus II, Duke of Mecklenburg- Schwerin and G\u00fcstrow( 1441 \u2013 20 November 1503) was duke of Mecklenburg- Schwerin from 1477 until his death."]], ["Princess Louise of Saxe-Gotha-Altenburg (1756\u20131808)", ["Princess Louise of Saxe- Gotha -Altenburg,( born 9 March 1756 in Roda, Duchy of Saxe- Gotha- Altenburg; died 1 January 1808 at Schloss Ludwigslust in Ludwigslust, Duchy of Mecklenburg- Schwerin) was Duchess consort of Mecklenburg- Schwerin through her marriage to Frederick Francis I, Grand Duke of Mecklenburg, Louise was also a member of the House of Mecklenburg."]], ["Princess Alexandrine of Prussia (1803\u20131892)", ["Princess Alexandrine of Prussia( 23 February 1803 \u2013 21 April 1892) was Grand Duchess of Mecklenburg- Schwerin by marriage to Paul Frederick, Grand Duke of Mecklenburg- Schwerin.", "She was the daughter of Frederick William III of Prussia and Louise of Mecklenburg- Strelitz."]], ["Duke Louis of Mecklenburg-Schwerin", ["Duke Louis of Mecklenburg- Schwerin( 6 August 172512 September 1778) was heir to the Dukedom of Mecklenburg- Schwerin from 1756 to his death.", "He was also the father of the first Grand Duke of Mecklenburg- Schwerin Frederick Francis I"]]]
supporting_facts: [["Duchess Marie Louise of Mecklenburg-Schwerin", 0], ["Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin", 1]]
evidences: [["Duchess Marie Louise of Mecklenburg-Schwerin", "father", "Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin"], ["Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin", "father", "Frederick Francis I, Grand Duke of Mecklenburg-Schwerin"]]
answer: Frederick Francis I, Grand Duke of Mecklenburg-Schwerin