Given the task definition, example input & output, solve the new input case.
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.
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Output: 1
The question refers to the 704th unit and task about war which is decribed by Passage 1.

New input case for you: Question: Who is the current president of the university where Bengough graduated? Passage 1:Metrolink has had close connections with popular culture in Manchester and has taken advantage of the city's strong associations with football culture. Metrolink has been a "Football Development Partner" with the Manchester Football Association since August 2010, meaning it is the association's Official Travel Partner and supports grassroots association football in Greater Manchester by selecting a "Team of the Month". In 2013, then Manchester City F.C. manager Roberto Mancini and players Joe Hart, Vincent Kompany and James Milner recorded special stop announcements to be used on Metrolink's East Manchester Line on dates when Manchester City play at home at the City of Manchester Stadium (served by the Etihad Campus tram stop). The announcements were first used on 17 February 2013, for Manchester City's FA Cup Fifth Round tie against Leeds United A.F.C.
 Passage 2:To date, the Steelers have won a total of ten MJHL Turnbull Cup Championships. Three of these championship teams went on to win the Anavet Cup. The 1973-74 season was the Steelers' most successful season. which saw them win the MJHL title and then defeat the Prince Albert Raiders 4-games-to-2 to win the Anavet Cup. They went on to compete for the Abbott Cup against the Kelowna Buckaroos of the British Columbia Junior Hockey League and defeated them 4-games-to-3. This advanced the Steelers to the national championship against the Smiths Falls Bears of the Central Junior A Hockey League for the Manitoba Centennial Cup, the National Junior "A" Championship. The series went seven games, with the Steelers stealing Game 7 1-0 in overtime to clinch their first and, so far, only national title.  The 1974 Selkirk Steelers were inducted into the Manitoba Hockey Hall of Fame in the team category.
 Passage 3:Born in Niagara Falls, New York, Bengough was a graduate of Niagara University. He began his professional baseball career at the age of 18 with the Buffalo Bisons of the International League in 1917. After having played for six seasons in Buffalo, he made his major league debut with the Yankees on May 18, 1923 at the age of 24. 1923 was also the first year the Yankees played their home games in Yankee Stadium. At the beginning of his playing career, Bengough served as a back up catcher to Wally Schang. On June 1, 1925, the same day that Lou Gehrig replaced Wally Pipp as the Yankees' first baseman, Bengough was given the Yankees' starting catcher's job. He ended the season with a .258 batting average along with a career-high 14 doubles and 23 runs batted in.

Output:
3