question: Who is Alexandra Of Lithuania's father-in-law?
context: [["Bill Dundee", ["William\" Bill\" Cruickshanks( born 24 October 1943) is a Scottish born- Australian professional wrestler and author better known by his stage name Bill Dundee.", "Cruickshanks is the father of Jamie Dundee and the father- in- law of wrestler Bobby Eaton."]], ["John Adams (merchant)", ["John Adams( 1672 or 1673 \u2013 1745) was an American- born Canadian merchant and member of the Nova Scotia Council.", "He was the father- in- law of Henry Newton( politician)."]], ["Siemowit IV, Duke of Masovia", ["Siemowit IV (Ziemowit IV), also known as Siemowit IV the Younger", "(pl: \"", "Siemowit IV M\u0142odszy\"; ca. 1353/1356 \u2013 21 January 1426)", ", was a Polish prince member of the House of Piast from the Masovian branch, from 1373/74 Duke of Rawa, and after the division of the paternal inheritance between him and his brother in 1381, ruler over Rawa, P\u0142ock, Sochaczew, Gostynin, P\u0142o\u0144sk and Wizna, since 1386 hereditary Polish vassal, since 1388 ruler over Belz, during 1382\u20131401 he lost Wizna and during 1384\u20131399 and 1407\u20131411 he lost Zawkrze, during 1384\u20131399 he lost P\u0142o\u0144sk, taken by the Teutonic Order.", "He was the second son of Siemowit III, Duke of Masovia and his first wife Euphemia, daughter of Nicholas II of Opava.", "Already during his father's lifetime, Siemowit IV received his own district, Rawa Mazowiecka (ca. 1373/74), and as a result of the partition of Masovia between him and his older brother", "Janusz", "I after the death of their father on 16 June 1381, Siemowit IV finally obtain the totality of his domains:", "Rawa, P\u0142ock, Sochaczew, Gostynin, P\u0142o\u0144sk and Wizna."]], ["James Armour (Master mason)", ["James Armour (15 January 1730 \u2013 20 September 1798) was a master mason and father of Jean Armour, and therefore the father-in-law of the poet Robert Burns."]], ["Ludwig von Westphalen", ["Johann Ludwig von Westphalen( 11 July 1770 \u2013 3 March 1842) was a liberal Prussian civil servant and the father- in- law of Karl Marx."]], ["Barthold A. Butensch\u00f8n Sr.", ["Hans Barthold Andresen Butensch\u00f8n( 27 December 1877 \u2013 28 November 1971) was a Norwegian businessperson.", "He was born in Kristiania as a son of Nils August Andresen Butensch\u00f8n and Hanna Butensch\u00f8n, and grandson of Nicolay Andresen.", "Together with Mabel Anette Plahte( 1877 \u2013 1973, a daughter of Frithjof M. Plahte) he had the son Hans Barthold Andresen Butensch\u00f8n Jr. and was through him the father- in- law of Ragnhild Butensch\u00f8n and grandfather of Peter Butensch\u00f8n.", "Through his daughter Marie Claudine he was the father- in- law of Joakim Lehmkuhl, through his daughter Mabel Anette he was the father- in- law of Harald Astrup( a son of Sigurd Astrup) and through his daughter Nini Augusta he was the father- in- law of Ernst Torp.", "He took commerce school and agricultural school.", "He was hired in the family company N. A. Andresen& Co, and became a co-owner in 1910.", "He eventually became chief executive officer.", "The bank changed its name to Andresens Bank in 1913 and merged with Bergens Kreditbank in 1920.", "The merger was dissolved later in the 1920s.", "He was also a landowner, owning Nedre Sk\u00f8yen farm and a lot of land in Enebakk.", "He chaired the board of Nydalens Compagnie from 1926, having not been a board member before that.", "He also chaired the supervisory council of Forsikringsselskapet Viking and Nedre Glommen salgsforening, and was a supervisory council member of Filharmonisk Selskap.", "He was a member of the gentlemen's club SK Fram since 1890, and was proclaimed a lifetime member in 1964.", "He was buried in Enebakk."]], ["Mohammad Ilyas (cricketer)", ["Mohammad Ilyas Mahmood( born March 19, 1946, Lahore, Punjab) is a former Pakistani cricketer who played in ten Tests from 1964 to 1969.", "He is the father- in- law of Imran Farhat."]], ["Alexandra of Lithuania", ["Alexandra (died 20 April 1434 in P\u0142ock) was the youngest daughter of Algirdas, Grand Duke of Lithuania, and his second wife, Uliana of Tver.", "Though Alexandra's exact date of birth is not known, it is thought that she was born in the late 1360s or early 1370s.", "In 1387, she married Siemowit IV, Duke of Masovia, and bore him thirteen children."]], ["Peter Burroughs", ["Peter Burroughs( born 27 January 1947) is a British television and film actor, the director of Willow Management.", "He is the father- in- law of actor and TV presenter Warwick Davis."]], ["Ogawa Mataji", ["Viscount was a general in the early Imperial Japanese Army.", "He was also the father- in- law of Field Marshal Gen Sugiyama."]]]
supporting_facts: [["Alexandra of Lithuania", 2], ["Siemowit IV, Duke of Masovia", 4]]
evidences: [["Alexandra of Lithuania", "spouse", "Siemowit IV"], ["Siemowit IV", "father", "Siemowit III, Duke of Masovia"]]
answer: Siemowit III, Duke of Masovia