You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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

New input: Question: How old was Lord Cornwallis the year that he sent Alexander Ross home with the despatches of the Battle of Camden? Passage 1:Lieutenant Ross became captain on 30 May, and served with distinction throughout the American war of independence. He was aide-de-camp to Lord Cornwallis and was sent home by him with the despatches of the Battle of Camden on 16 Aug. 1780. He was made major in the 45th Regiment of Foot on 25 October 1780. He represented Lord Cornwallis as commissioner in arranging the details of the surrender of Yorktown. In May 1782 he was sent to Paris to arrange for the exchange of Lord Cornwallis, which was only effected by the peace of 20 January 1783. In August 1783 Ross was appointed deputy adjutant-general in Scotland, with the rank of lieutenant-colonel, and he served in a similar capacity in India under Lord Cornwallis. He became colonel on 12 October 1793. In August 1794 he went with Earl Spencer and Thomas Grenville to Vienna on a special mission to arrange that Lord Cornwallis should command the allies against the French. Their efforts were unsuccessful. He accompanied Lord Cornwallis as major-general to Warley camp in April 1795, and two months later was nominated Surveyor-General of the Ordnance in succession to George Cranfield Berkeley.
 Passage 2:The 2011 Iowa State Cyclones football team represented Iowa State University in the 2011 NCAA Division I FBS football season. The Cyclones were led by third year head coach Paul Rhoads and play their home games at Jack Trice Stadium. They are a member of the Big 12 Conference. The conference play began with a loss at home to the Texas Longhorns, and ended with a loss at Manhattan, Kansas to the Kansas State Wildcats in the Farmageddon series, with a 3–6 record. The season will likely be remembered for the game against then #2 Oklahoma State Cowboys, who the Cyclones upset in a double-overtime thriller throwing the BCS into "utter chaos" as dubbed by sports media. The Iowa State squad was invited to the first Pinstripe Bowl game, which they were defeated by Rutgers, and the Cyclone's 2011 season came to a close with 6–7 overall record, 3–6 in Big 12 play, finished 8th place.
 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.

Solution:
1