Question: What other country was the queen who launched Dannebrog, also a queen for between 1918 and 1944?

full_context: Document 1: Succession to the Danish throne: The Danish Act of Succession, adopted on 27 March 1953, restricts the throne to those descended from Christian X and his wife, Alexandrine of Mecklenburg-Schwerin, through approved marriages. Succession is governed by absolute primogeniture.
Document 2: Queen of the Netherlands (ship): Queen of the Netherlands is a Dutch Trailing suction hopper dredger ship constructed in 1998. After lengthening in 2009, she was the largest and most powerful dredger in the world. The vessel has been used in high-profile salvage and dredging operations including the investigation into the Swissair Flight 111 crash and in the Port Phillip Channel Deepening Project. It has been called "the world's largest floating vacuum cleaner".
Document 3: Knud, Hereditary Prince of Denmark: Knud, Hereditary Prince of Denmark (Knud Christian Frederik Michael; 27 July 1900 – 14 June 1976), was the younger son and child of Christian X and Alexandrine of Mecklenburg-Schwerin.
Document 4: BRP Ang Pangulo (AT-25): BRP "Ang Pangulo" (AT-25) is a presidential yacht and was acquired by the Philippine government in 1959. The yacht was first used by President Carlos P. Garcia for entertaining and over the years the yacht has known many famous guests including British ballerina Margot Fonteyn, actress Brooke Shields, dancer Rudolf Nureyev, concert pianist Van Cliburn and Cristina Ford, former wife of Henry Ford II, who was once chairman of Ford Motor Co.
Document 5: Crown Princess (ship): Crown Princess is a "Grand"-class cruise ship owned and operated by Princess Cruises. Her maiden voyage took place on June 14, 2006, departing Red Hook, Brooklyn (New York) for Grand Turk (Turks & Caicos), Ocho Rios (Jamaica), Grand Cayman (Cayman Islands), and Port Canaveral (Florida). As of 2015, the "Crown Princess" sails to Mexico for the Winter season, and Alaska for the Summer season. Like her sister ships "Emerald Princess" and "Ruby Princess" her Skywalkers Night Club is built aft of the funnel rather than suspended over the stern. Her godmother is Martha Stewart.
Document 6: Alexandrine of Mecklenburg-Schwerin: Alexandrine of Mecklenburg-Schwerin (24 December 1879 – 28 December 1952) was Queen of Denmark as the spouse of King Christian X. She was also Queen of Iceland from 1 December 1918 to 17 June 1944.
Document 7: Princess Alexia of Greece and Denmark: Princess Alexia of Greece and Denmark (Greek: Αλεξία ; born 10 July 1965) is the eldest child of Constantine II and Anne-Marie of Denmark, who were the last King and Queen of Greece, reigning from 1964 to 1973.
Document 8: Princess Alexandrine of Prussia (1842–1906): Princess Frederica Wilhelmina Louise Elisabeth "Alexandrine" of Prussia (1 February 1842 – 26 March 1906) was a member of the House of Hohenzollern as the daughter of Prince Albert of Prussia and his wife Princess Marianne of the Netherlands.
Document 9: HDMS Vædderen (F359): HDMS (Her Danish Majesty's Ship) "Vædderen" (F359) is a "Thetis"-class ocean patrol vessel of the Royal Danish Navy. She is employed to exercise Danish sovereignty in waters around the Faroe Islands and Greenland.
Document 10: Maria Feodorovna (Dagmar of Denmark): Maria Feodorovna (26 November 1847 – 13 October 1928), born Princess Dagmar of Denmark, was a Danish princess and Empress of Russia as spouse of Emperor Alexander III (reigned 1881–1894). She was the second daughter of King Christian IX of Denmark and Louise of Hesse-Kassel; her siblings included Queen Alexandra of the United Kingdom, King Frederick VIII of Denmark and King George I of Greece. Her eldest son became the last Russian monarch, Emperor Nicholas II of Russia, whom she outlived by ten years.
Document 11: Margrethe II of Denmark: Margrethe II (Danish: "Margrethe 2." , ] ; Faroese: "Margreta 2." ; Greenlandic: "Margrethe II" ; full name: "Margrethe Alexandrine Þórhildur Ingrid"; born 16 April 1940) is the Queen of Denmark. She is also the supreme authority of the Church of Denmark and Commander-in-Chief of the Danish Defence. Born into the House of Glücksburg, a royal house with origins in Northern Germany, she was the eldest child of Frederick IX of Denmark and Ingrid of Sweden. She succeeded her father upon his death on 14 January 1972, having had become heir presumptive to her father in 1953, when a constitutional amendment allowed women to inherit the throne. On her accession, Margrethe became the first female monarch of Denmark since Margaret I, ruler of the Scandinavian kingdoms in 1375–1412 during the Kalmar Union. In 1967, she married Henri de Laborde de Monpezat, with whom she has two sons: Crown Prince Frederik (born 1968) and Prince Joachim (born 1969). She has been on the Danish throne for 45 years, becoming the second-longest-reigning Danish monarch after her ancestor Christian IV.
Document 12: Caroline Amalie of Augustenburg: Caroline Amalie of Schleswig-Holstein-Sonderburg-Augustenburg (28 June 1796 – 9 March 1881) was queen consort of Denmark as the second spouse of King Christian VIII between 1839 and 1848.
Document 13: Marienborg: Marienborg has been the official residence of Denmark's prime minister since 1962. It is frequently used for governmental conferences, summits and other official purposes, including the prime minister's new year speech. Unlike the residences of other heads of government and state (e.g. the White House, 10 Downing Street, La Moncloa and Élysée Palace), Marienborg does not serve as the government headquarters or contain the office of the prime minister, instead Christiansborg Palace is the location of the government departments.
Document 14: HDMY Dannebrog (A540): Her Danish Majesty's Yacht "Dannebrog" (A540) (Danish: "KDM Dannebrog" ) was launched by Queen Alexandrine at Copenhagen in 1931, and commissioned on 26 May 1932. The yacht now serves as the official and private residence for Queen Margrethe II of Denmark, the Prince Consort, and members of the Royal Family when they are on official visits overseas and on summer cruises in Danish waters. When at sea, the Royal Yacht also participates in surveillance and sea-rescue services.
Document 15: Ingrid of Sweden: Ingrid of Sweden (Ingrid Victoria Sofia Louise Margareta; 28 March 1910 – 7 November 2000) was Queen of Denmark from 1947 until 1972 as the wife of King Frederick IX.
ground_truth: Iceland