In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
One example: Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage 1: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lô during July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
. Passage 2: John Ford (1894–1973) was an American film director whose career spanned from 1913 to 1971. During this time he directed more than 140 films. Born in Maine, Ford entered the filmmaking industry shortly after graduating from high school with the help of his older brother, Francis Ford, who had established himself as a leading man and director for Universal Studios. After working as an actor, assistant director, stuntman, and prop man – often for his brother – Universal gave Ford the opportunity to direct in 1917. Initially working in short films, he quickly moved into features, largely with Harry Carey as his star. In 1920 Ford left Universal and began working for the Fox Film Corporation. During the next ten years he directed more than 30 films, including the westerns The Iron Horse (1924) and 3 Bad Men (1926), both starring George O'Brien, the war drama Four Sons and the Irish romantic drama Hangman's House (both 1928 and both starring Victor McLaglen). In the same year of these last two films, Ford directed his first all-talking film, the short Napoleon's Barber. The following year he directed his first all-talking feature, The Black Watch.
. Passage 3: Since the late 1970s, the central part of NYU is its Washington Square campus in the heart of Greenwich Village. Despite being public property, and expanding the Fifth Avenue axis into Washington Square Park, the Washington Square Arch is the unofficial symbol of NYU. Until 2008, NYU's commencement ceremony was held in Washington Square Park. However, due to space constraints, ceremonies are now held at the Yankee Stadium. Important facilities at Washington Square are the Elmer Holmes Bobst Library, designed by Philip Johnson and Richard Foster, who also designed several other structures, such as Tisch Hall, Meyer Hall, and the Hagop Kevorkian Center. When designing these buildings Johnson and Foster also set up a master plan for a complete redesign of the NYU Washington Square campus. However, it was never implemented. Other historic buildings include the Silver Center (formerly known as "Main building"); the Brown Building of Science; Judson Hall, which houses the King Juan Carlos I of Spain Center; Vanderbilt Hall, the historic townhouse row on Washington Square North; The Grey Art Gallery at 100 Washington Square East, housing the New York University art collection and featuring museum quality exhibitions; the Kaufman Management Center; and the Torch Club – the NYU dining and club facility for alumni, faculty, and administrators. Just a block south of Washington Square is NYU's Washington Square Village, housing graduate students and junior and senior faculty residences in the Silver Towers, designed by I. M. Pei, where an enlargement of Picasso's sculpture Bust of Sylvette (1934) is displayed.
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Solution is here: 1
Explanation: The question refers to the 704th unit and task about war which is decribed by Passage 1.

Now, solve this: Question: When did the Northern Mariana Islands become a territory of the United States? Passage 1:Brinkhorst attended the Christian Gymnasium Sorghvliet in The Hague from June 1945 until June 1954 and applied at the Leiden University in June 1954 majoring in Law and obtaining an Bachelor of Laws degree in June 1956 before graduating with an Master of Laws degree in July 1959. Brinkhorst applied at the Columbia University in New York City in August 1959 for a postgraduate education in Political science and obtained an Bachelor of Social Science degree before graduating with an Master of Social Science in September 1961. Brinkhorst worked as a paralegal at Shearman & Sterling in New York City from September 1961 until December 1962. Brinkhorst worked as a researcher at the Leiden University from December 1962 until January 1967 and as an associate professor of International law at the Leiden University from April 1965 until January 1967 and as a professor of International law, International relations and European law at the University of Groningen from January 1967 until 11 May 1973. Brinkhorst served on the Provincial-Council of Groningen from July 1970 until August 1971. After the election of 1972 Brinkhorst was appointed as State Secretary for Foreign Affairs in the Cabinet Den Uyl, taking office on 19 December 1977. The Cabinet Den Uyl fell on 22 March 1977 after four years of tensions in the coalition and continued to serve in a demissionary capacity. Brinkhorst was elected as a Member of the House of Representatives after the election of 1977, taking office on 8 June 1977 but he was still serving in the cabinet and because of dualism customs in the constitutional convention of Dutch politics he couldn't serve a dual mandate he subsequently resigned as State Secretary on 8 September 1977. After the election of 1981 the Leader of the Democrats 66 and Parliamentary leader of the Democrats 66 in the House of Representatives Jan Terlouw was appointed as Deputy Prime Minister and Minister of Economic Affairs in the Cabinet Van Agt II and Brinkhorst was selected as his successor as Parliamentary leader in the House of Representatives on 11 September 1981. After the Leader of the Democrats 66 Terlouw announced that he was stepping down as Leader following a big loss in the election of 1982 the Democrats 66 leadership appointed Brinkhorst as his successor on 8 September 1982. In October 1982 Brinkhorst was nominated as Ambassador of the European Union to Japan, he resigned as Leader and as Parliamentary leader and as a Member of the House of Representatives on 11 November 1982 and was installed as Ambassador, taking office on 1 December 1982. In December 1986 Brinkhorst was nominated as Director-General of the Scientific Committee on Consumer Safety of the European Commission, he resigned as Ambassador the same day he was installed as Director-General, serving from 1 January 1987 until his resignation 19 July 1994. 
 Passage 2:After the Nazis came to power, he emigrated to Switzerland in 1933 and to the United States later. He began his studies in Zurich and worked part-time as a house teacher. Meanwhile, he wrote articles and book reviews for the Neue Zürcher Zeitung, using several pseudonyms because of prohibition of work. He earned his PhD and taught French and German Literature at various universities, including Princeton University and University of Wisconsin-Madison. During a journey to Europe, Vordtriede was surprised by the outbreak of the Second World War and interned as an Enemy alien in occupied France. By interventions, he became free months later and was allowed to go back to America. He met his mother in New York City late in 1941, who also emigrated to the USA. He received the American citizenship in 1946 and became a Guggenheim Fellow in 1957. His sister Fränze emigrated in 1947 and went to Philadelphia.
 Passage 3:The One Hundred Eleventh United States Congress was a meeting of the legislative branch of the United States federal government from January 3, 2009, until January 3, 2011. It began during the last two weeks of the George W. Bush administration, with the remainder spanning the first two years of Barack Obama's presidency. It was composed of the Senate and the House of Representatives. The apportionment of seats in the House was based on the 2000 U.S. Census. In the November 4, 2008 elections, the Democratic Party increased its majorities in both chambers, giving President Obama a Democratic majority in the legislature for the first two years of his presidency. A new delegate seat was created for the Northern Mariana Islands. The 111th Congress had the most experienced members in history: at the start of the 111th Congress, the average member of the House had served 10.3 years, while the average Senator had served 13.4 years.

Solution:
3