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: Which river involved in shipbuilding in the North East region of England is the longest? Passage 1:During the presidential campaign of 1948, as Cold War fears of communist global expansion mounted, critics of the Truman administration heatedly raised the question "Who Lost China?." Criticism mounted after Truman's surprising victory in the election as the Communist Party of China led by Mao Zedong steadily defeated Chinese Nationalist armies of Chiang Kai-shek and was winning the Chinese Civil War. In November 1948 John Paton Davies proposed a collection of documents to explain and defend American policy in China to the American public, an idea that Secretary of State Dean Acheson ordered his staff to prepare. The group was headed by the Director of the Far Eastern Division, Walton Butterworth but much of the work was done by John F. Melby, who had served for the State Department in the Soviet Union and China during the war, and by Charles Yost. The 1054 page volume was published August 1949, as Mao and his retinue waited outside the city of Beiping, as Beijing was then called, 
 Passage 2:In February 1984, Nissan and the UK government signed an agreement to build a car plant in the UK. The following month a greenfield site in Sunderland, Tyne and Wear, was chosen. As an incentive the land was offered to Nissan at agricultural prices; around £1,800 per acre. The North East region of England had recently undergone a period of industrial decline, with the closure of most of the shipyards on the Wear and Tyne, and the closure of many coal mines on the once prosperous Durham coalfield. The high unemployment this caused meant Nissan had a large, eager, manufacturing-skilled workforce to draw upon. The site, once the Sunderland Airfield (formerly RAF Usworth), was close to ports on the Wear and Tyne, within easy driving distance of the international Newcastle Airport, and close to major trunk roads such as the A1 and A19, as well as major ports for the export of vehicles. The established company became known as Nissan Motor Manufacturing (UK) Ltd, or NMUK. A ground breaking ceremony took place in July, and work began on the site in November 1984, by building contractors Sir Robert McAlpine.
 Passage 3:In 1918, Seymour met Victor Heerman. Heerman directed a screen test featuring Seymour and one of D.W. Griffith's Artcraft stock company actors Robert Harron. Griffith was pleased with the pairing and with Seymour's knack for light comedy and hired her as member of his stock company. Griffith cast Seymour with Harron, Richard Barthelmess and Carol Dempster in the drama The Girl Who Stayed at Home (1919). Although the film was not well received by critics, Seymour's performance was and the public interest in her began to grow. Later that year, she was paired with Robert Harron again in True Heart Susie (1919) which also featured Lillian Gish. Seymour followed with role in Scarlet Days (1919), also opposite Richard Barthelmess and Carol Dempster. In 1920, Griffith cast Seymour in the lead role in The Idol Dancer. The film was not well received by audiences but they were taken by Seymour's performance. Shortly after the film's release, Seymour was featured on the cover of Motion Picture Magazine.

Solution:
2