Question: In what War did the father of Princess Christina Margarethe of Hesse die?

full_context: Document 1: Princess Tatiana of Sayn-Wittgenstein-Berleburg: Princess Tatiana of Sayn-Wittgenstein-Berleburg (Tatiana Louise Ursula Therese Elsa; born 31 July 1940) is the fourth child and second daughter of Gustav Albrecht, 5th Prince of Sayn-Wittgenstein-Berleburg, and his wife, Margareta Fouché d'Otrante, and younger sister of Prince Richard of Sayn-Wittgenstein-Berleburg, the husband of Princess Benedikte of Denmark. Tatjana is the former wife of the late Moritz, Landgrave of Hesse, from 1980 head of the House of Hesse. Their marriage took place in the summer of 1964 in Gießen. They divorced in 1974.
Document 2: Princess Christina Margarethe of Hesse: Princess Christina Margarethe of Hesse (German: "Prinzessin Christina Margarethe von Hessen" ; 10 January 1933 – 22 November 2011) was the eldest daughter of Prince Christoph of Hesse and Princess Sophie of Greece and Denmark. From 1956 to 1962, she was married to Prince Andrew of Yugoslavia, with whom she had two children. Her second marriage to Robert Floris van Eyck, a Dutch artist based in London, lasted from 1962 to 1986.
Document 3: Princess Christina of the Netherlands: Princess Christina of the Netherlands (Maria Christina; born 18 February 1947) is the youngest of four daughters born to Queen Juliana of the Netherlands and Prince Bernhard of Lippe-Biesterfeld.
Document 4: Princess Margaretha of Liechtenstein: Princess Margaretha of Liechtenstein (born "Princess Margaretha of Luxembourg" on 15 May 1957) is the fourth child and second daughter of Grand Duke Jean of Luxembourg and Princess Joséphine Charlotte of Belgium. As the sister of Grand Duke Henri of Luxembourg and the sister-in-law of Prince Hans-Adam II of Liechtenstein, she is a princess of two current realms and a member of the Luxembourg and Liechtenstein reigning dynasties. The Princess holds similar precedence in both monarchies, as sister and sister-in-law of the Sovereign.
Document 5: Philipp, Prince of Hohenlohe-Langenburg: Philipp, 10th Prince of Hohenlohe-Langenburg (Philipp Gottfried Alexander; born 20 January 1970 in Crailsheim, West Germany), is the middle child and only son of Kraft, Prince of Hohenlohe-Langenburg and his first wife, Princess Charlotte of Croÿ. Upon the death of his father in 2004, he became the titular Prince of Hohenlohe-Langenburg.
Document 6: Princess Christina, Mrs. Magnuson: Princess Christina, Mrs. Magnuson, {'1': ", '2': ", '3': 'LoK av KMO', '4': "} ("Christina Louise Helena", born 3 August 1943) is the youngest of four older sisters of King Carl XVI Gustaf of Sweden. She generally uses the name Christina Magnuson.
Document 7: Prince Christoph of Hesse: Christoph Ernst August of Hesse (Frankfurt, 14 May 1901 – Apennine Mountains near Forlì, 7 October 1943) was the fifth son of Prince Frederick Charles of Hesse and Princess Margaret of Prussia. He was a German SS officer killed accidentally during World War II.
Document 8: Princess Marie Gabriele of Luxembourg: Princess Marie Gabriele of Luxembourg, Countess of Holstein-Ledreborg (given names: "Marie Gabrielle Aldegunde Wilhelmine Louise"; born 2 August 1925) is the third daughter and fourth of the six children of Grand Duchess Charlotte of Luxembourg and her husband Prince Félix. She is the younger sister of former Grand Duke Jean of Luxembourg and thus a paternal aunt to the current Grand Duke, Jean's son Grand Duke Henri. In 1951 she married Danish Count Karl Johan Ludvig, 7th Count of Holstein-Ledreborg (2 October 1919 – 25 June 2001), Roman Catholic; the couple were married for 50 years until his death in 2001. Together, they had seven daughters.
Document 9: Princess Johanna of Hesse and by Rhine: Princess Johanna Marina Eleonore of Hesse and by Rhine (Johanna Marina Eleonore Prinzessin und Landgräfin von Hessen; 20 September 1936 – 14 June 1939) was the third child and only daughter of Georg Donatus, Hereditary Grand Duke of Hesse, and Princess Cecilie of Greece and Denmark. She was orphaned at the age of fourteen months when her parents, older brothers Ludwig and Alexander and paternal grandmother Eleonore were killed in a plane crash on their way to a family wedding in London. The remains of her unnamed stillborn baby brother were also found among the wreckage.
Document 10: Alexander Frederick, Landgrave of Hesse: Alexander Frederick, Landgrave of Hesse (German: "Alexander Friedrich Wilhelm Albrecht Georg Landgraf von Hessen" 25 January 1863, Copenhagen – 26 March 1945) was a Hesse-Kassel and Prussian Prince. He was the son of Prince Frederick William of Hesse-Kassel and Princess Anna of Prussia. From 1888–1925 he was Head of the House of Hesse, but abdicated his position to his brother Prince Frederick Charles of Hesse. He was visually handicapped from birth, and this, in addition to his morganatic marriage, played a part in his decision to abdicate.
Document 11: Princess Margaretha of Sweden: Princess Margaretha of Sweden (Margaretha Sofia Lovisa Ingeborg; 25 June 1899 – 4 January 1977) was a member of the Swedish Royal Family and a Princess of Denmark by marriage, the eldest sister of Märtha, Crown Princess of Norway, Queen Astrid of the Belgians and Prince Carl Bernadotte.
Document 12: Prince Christian-Sigismund of Prussia: Prince Christian-Sigismund of Prussia (born March 14, 1946) is one of the three paternal uncles of Georg Friedrich, Prince of Prussia, head of the House of Hohenzollern since 1994, which reigned over Germany until 1918. He is the youngest of four sons born to Louis Ferdinand, Prince of Prussia (1907-1994) and Grand Duchess Kira Kirillovna of Russia (1909-1967). He was the heir presumptive to the headship of the deposed House of Hohenzollern from the death of his father to 20 January 2013, when Georg Friedrich fathered twin sons, relegating Christian-Sigismund to a more remote place in the Line of succession to the former German throne.
Document 13: Prince Friedrich of Hesse and by Rhine: Prince Friedrich of Hesse and by Rhine (Friedrich Wilhelm August Victor Leopold Ludwig; 7 October 1870 – 29 May 1873) was the haemophiliac second son of Louis IV, Grand Duke of Hesse, and Princess Alice of the United Kingdom, one of the daughters of Queen Victoria. He was also a maternal great-uncle of Prince Philip, Duke of Edinburgh through his eldest sister Princess Victoria of Hesse and by Rhine.
Document 14: Moritz, Landgrave of Hesse: Moritz, Prince and Landgrave of Hesse ("Moritz Friedrich Karl Emanuel Humbert" 6 August 1926 – 23 May 2013) was the son of Prince Philip, Landgrave of Hesse, and the head of the House of Brabant and the German House of Hesse.
Document 15: Rudolf Hess: Rudolf Walter Richard Hess (Heß in German; 26 April 1894 – 17 August 1987), was a prominent politician in Nazi Germany. Appointed Deputy Führer to Adolf Hitler in 1933, he served in this position until 1941, when he flew solo to Scotland in an attempt to negotiate peace with the United Kingdom during World War II. He was taken prisoner and eventually was convicted of crimes against peace, serving a life sentence until his suicide.
ground_truth: World War II