question: Who is Elisabeth Helene Von Vieregg's mother-in-law?
context: [["Marian Shields Robinson", ["Marian Lois Robinson( n\u00e9e Shields; born July 29, 1937) is the mother of Michelle Obama, former First Lady of the United States, and Craig Robinson, a basketball executive, and the mother- in- law of former U.S. President Barack Obama."]], ["Baroness G\u00f6sta von dem Bussche-Haddenhausen", ["Baroness G\u00f6sta von dem Bussche- Haddenhausen( 26 January 1902 \u2013 13 June 1996) was the mother of Prince Claus of the Netherlands, who was the Prince Consort of Queen Beatrix of the Netherlands, thus making her the mother- in- law of the former Dutch Queen.", "She is also the paternal grandmother of King Willem- Alexander of the Netherlands, who is the current Dutch King."]], ["Vera Mileti\u0107", ["Vera Mileti\u0107 (Serbian Cyrillic: \u0412\u0435\u0440\u0430 \u041c\u0438\u043b\u0435\u0442\u0438\u045b; 8 March 1920 \u2013 7 September 1944) was a Serbian student and soldier.", "She was notable for being the mother of Mira Markovi\u0107, posthumously making her the mother-in-law of Serbian president Slobodan Milo\u0161evi\u0107."]], ["Elisabeth Helene von Vieregg", ["Elisabeth Helene von Vieregg (4 May 1679 \u2013 27 June 1704), Countess of Antvorskov, was a Danish noble and lady-in-waiting of German origin.", "She was the royal mistress of King Frederick IV of Denmark and, later, his first morganatic wife by bigamy."]], ["Frederick IV of Denmark", ["Frederick IV (11 October 1671 \u2013 12 October 1730) was the king of Denmark and Norway from 1699 until his death.", "Frederick was the son of King Christian V of Denmark-Norway and his consort Charlotte Amalie of Hesse-Kassel."]], ["Helene von Engelhardt", ["Helene von Engelhardt( sometimes referred to by her married name Helene Pabst, sometimes Helene von Engelhardt- Schnellenstein; \u2013) was a Baltic German poet, writer and translator."]], ["Priscilla Pointer", ["Priscilla Marie Pointer( born May 18, 1924) is an American stage, film and television character actress.", "She began her career in the theater, including productions on Broadway.", "Later, Pointer moved to Hollywood to act in films and on television.", "She is the mother of Amy Irving, therefore making her the former mother- in- law of filmmakers Steven Spielberg and Bruno Barreto and the mother- in- law of documentary filmmaker Kenneth Bowser, Jr."]], ["Cornelia (mother of the Gracchi)", ["Cornelia( c. 190s \u2013 c. 115 BC) was the second daughter of Publius Cornelius Scipio Africanus, the hero of the Second Punic War, and Aemilia Paulla.", "She is remembered as a prototypical example of a virtuous Roman woman.", "She was the mother of the Gracchi brothers, and the mother- in- law of Scipio Aemilianus."]], ["Eldon Howard", ["Eldon Howard was a British screenwriter.", "She was the mother- in- law of Edward J. Danziger and wrote a number of the screenplays for films by his company Danziger Productions."]], ["Maria Thins", ["Maria Thins( c. 1593 \u2013 27 December 1680) was the mother- in- law of Johannes Vermeer and a member of the Gouda Thins family."]]]
supporting_facts: [["Elisabeth Helene von Vieregg", 1], ["Frederick IV of Denmark", 1]]
evidences: [["Elisabeth Helene von Vieregg", "spouse", "Frederick IV of Denmark"], ["Frederick IV of Denmark", "mother", "Charlotte Amalie of Hesse-Kassel"]]
answer: Charlotte Amalie of Hesse-Kassel