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: Is the opera house that Brambilla visited while in Russia still standing? Passage 1:Getty Square is Yonkers' downtown and the civic center and central business district of the city. Much of southwest Yonkers grew densely along the multiple railroads and trolley (now bus) lines along South Broadway and in Getty Square, connecting to New York City. Clusters of apartment buildings surrounded the stations of the Yonkers branch of the New York and Putnam Railroad and the Third Avenue Railway trolley lines and these buildings still remain although now served by the Bee-Line Bus System. The railroad companies themselves built neighborhoods of mixed housing types ranging from apartment buildings to large mansions in areas like Park Hill wherein the railroad also built a funicular to connect it with the train station in the valley. This traditionally African-American and white area has seen a tremendous influx of immigrants from Mexico, Central America, the Caribbean, South Asia, and the Middle East. Off South Broadway and Yonkers Avenue one can find residential neighborhoods, such as Lowerre, Nodine Hill, Park Hill, and Hudson Park (off the Hudson River) with a mix of building styles ranging from dense clusters of apartment buildings, blocks of retail with apartments above, multifamily row houses, and detached single-family homes.
 Passage 2:Mrs. Bacon spent her early childhood in New York City and moved to Florida as an adolescent. She went to Antioch College, where she met her husband, Allen Bacon. During World War II, she accompanied her husband to work at Springfield Hospital in Sykesville, Maryland as his assignment for conscientious objector status. She also worked at the American Friends Service Committee for many years and was the inspiration for the rehabilitation of the Fair Hill Burial Ground, a historic Quaker cemetery in North Philadelphia and the final resting place of abolitionists Lucretia Mott and Robert Purvis. Mrs. Bacon authored biographies of both Mott and Purvis. A longtime trustee and Vice President of the Pennsylvania Abolition Society, she wrote a feature article titled "The Pennsylvania Abolition Society's Mission for Black Education" for the Historical Society of Pennsylvania's November 2005 newsletter. She was a founding board member of Women's Way, the country’s oldest and largest funding federation for women’s organizations. Bacon died at her home at Crosslands in Kennett Square, Pennsylvania on February 24, 2011.
 Passage 3:After her professional debut in 1831, Brambilla initially sang in several smaller opera houses in northern Italy but in 1833 scored a considerable success at Milan's Teatro Carcano singing Agnese in Bellini's Beatrice di Tenda and the leading soprano role in Fioravanti's Le cantatrici villane. She then appeared on Russia at the Odessa Opera House, which at the time specialised in Italian opera. Upon her return to Milan in 1837, she sang with her sister Marietta at La Scala in the world premiere of In morte di Maria Malibran de Bériot, a cantata in memory of Maria Malibran composed by Gaetano Donizetti, Giovanni Pacini, Saverio Mercadante, Nicola Vaccai and Pietro Antonio Coppola. After singing in Barcelona, she returned to La Scala for the 1839/1840 season in Mercadante's Le due illustri rivali and the world premieres of Mazzucato's I corsari and Coccia's Giovanna II.

A:
3