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: 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.
.
Example solution: 1
Example explanation: The question refers to the 704th unit and task about war which is decribed by Passage 1.

Problem: Question: How old was the 2012 Skate America Silver Medalist when she won that award? Passage 1:As of September 2010, YBF's "advisory board" includes Matthew Elliott, founder of the UK TaxPayers' Alliance, and representatives of the Heritage Foundation (a US conservative thinktank), US Competitive Enterprise Institute and American Conservative Union (a US conservative lobbying organisation). It also includes the founder of the US Leadership Institute, the President of the US Jesse Helms Center, the President of the Young America's Foundation, the co-founder of the US Henry Jackson Society and a former Executive Director of the Collegiate Network. British representatives include Professor Patrick Minford, blogger Iain Dale (who resigned in the same year) and two local councillors. Liam Fox, the shadow defence secretary, was a member of the YBF's parliamentary council. Conor Burns was until shortly before becoming an MP in 2010 the vice-president of YBF.
 Passage 2:In the course of the French occupation of the lands on the Rhine’s left bank in the wake of the Treaty of Lunéville, Rhaunen was grouped into the Department of Sarre, the arrondissement of Birkenfeld and the canton of Rhaunen. After the French withdrew in 1814, Rhaunen found itself in Prussia’s new Rhine Province, also becoming the seat of a Bürgermeisterei (“mayoralty”) in the Bernkastel-Kues district. Parts of the old high court district, however – Bundenbach, for instance – now belonged to the Principality of Birkenfeld, an exclave of the Grand Duchy of Oldenburg, most of whose territory was in what is now northwest Germany, with a coastline on the North Sea. Even after the First World War, through the Weimar Republic and on through the time of the Third Reich, Rhaunen was the administrative seat for the surrounding villages. In the course of administrative restructuring in the 1960s, the Amt of Rhaunen became the Verbandsgemeinde of Rhaunen in the Birkenfeld district. This arrangement still stands.
 Passage 3:Mitchell currently works as a coach with former Swedish national champion Peter Johansson at the Skating Club of Boston. Their students include 2012 Skate America Silver Medalist Christina Gao, 2007 World Junior champion Stephen Carriere, 2008 Eastern Sectional champion Katrina Hacker, 2007 US National junior pewter medalist Curran Oi, 2007 Eastern Sectional champion Kylie Gleason, two time Junior Grand Prix gold medalist Juliana Cannarozzo, 2008 US National junior bronze medalist Brittney Rizo, 2007 Canadian Junior Champion Dana Zhalko-Tytarenko, and 2009 US National Junior Champion Ross Miner. They formerly coached 2003 U.S. pewter medalist Scott Smith, 2007 US National silver medalist Emily Hughes, 2004 US National Junior silver medalist Jason Wong, 2003 US National Novice bronze medalist Jessica Houston, and 2003 US National Junior Champion Erica Archambault.
Solution: 3