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.

Example input: 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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Example output: 1
Example explanation: The question refers to the 704th unit and task about war which is decribed by Passage 1.
Q: Question: Who is currently holding the position of Commander of the Royal Canadian Air Force? Passage 1:John Cranch (1751–1821), painter, born at Kingsbridge, Devonshire, 12 Oct. 1751, taught himself as a boy drawing, writing, and music, and while a clerk at Axminster also received instruction from a Roman Catholic priest. Inheriting some money, he came to London and painted portraits and historical pictures. He failed, however, to get a place on the walls of the Royal Academy, but was more successful at the Society of Artists, to which he contributed Burning of the Albion Mills, and at the British Institution, to which he contributed eight pictures in 1808. His best picture was The Death of Chatterton, now in the possession of Sir James Winter Lake, bart., who also owns a portrait of Cranch, which was engraved by John Thomas Smith. He is said to have excelled in "poker-pictures", and to have been befriended by Sir Joshua Reynolds. Reynolds in his youth had received valuable assistance from a Mr. and Mrs. Cranch of Plympton, Devonshire, who were doubtless relatives of John Cranch. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1797 and a member of the American Antiquarian Society in 1818. After residing many years at Bath, Cranch died there in his seventieth year in February 1821. He published two works—On the Economy of Testaments (1794), and Inducements to promote the Fine Arts of Great Britain by exciting Native Genius to independent Effort and original Design (1811). There is a picture by him in the South Kensington Museum.
 Passage 2:Leaving Collurian he worked as a porter at Penzance railway station for the Great Western Railway and with the free pass, that was part of his entitlement, he travelled to London to search for a post as a journalist. He landed his first job with The Dairy Farmer and later Farmers Weekly. He travelled to the West Indies in 1939 and Canada where he joined the Canadian Army at the outbreak of World War II, but was invalided out in 1941. Back in Britain, he started as a sub-editor on the Daily Express, and later as a personal assistant to Manny Shinwell, a Labour MP, writing speeches for members of the party. In 1949 he became political columnist for the Daily Mirror, and unsuccessfully standing as a Labour party candidate for Bristol West in 1950 and 1951.
 Passage 3:Blondin joined the Canadian Forces in 1980 and completed his flight training in 1982. He was assigned to fly Lockheed T-33 jet trainers for his first operational tour. In 1986, he underwent fighter pilot training on the CF-5 and CF-18, and became part of the first group of pilots flying the CF-18 with 433 Squadron in Bagotville, Quebec in 1988. He became Commanding Officer of 425 Tactical Fighter Squadron at Bagotville in 2000 (in which role he supported NATO forces in the former Yugoslavia), a member of the Canadian staff in NORAD Headquarters in 2002 and Commander of 3 Wing Bagotville in 2004. He was deployed to Afghanistan, as Director of Staff in ISAF Headquarters, in 2006 and then assigned as Deputy Commander Force Generation at 1 Canadian Air Division in Winnipeg in 2007. He attended the Space Operations Course for senior leaders at the National Security Space Institute in January 2008 and served as the Commander of 1 Canadian Air Division / Canadian NORAD Region from July 2009 to July 2011 when he was appointed Assistant Chief of the Air Staff. He became Commander of the Royal Canadian Air Force on September 27, 2012.

A:
3