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: What year was the plane introduced that Carpenter trained for at Whidbey Island? Passage 1:Zaïre was soon translated into English by Aaron Hill as Zara: A Tragedy. Following its successful run at London's Drury Lane Theatre in 1736, Zara became the most frequently staged English adaptation of a Voltaire play. Famous English actresses who have played the title role include Susannah Maria Cibber, who made her stage debut in the 1736 Drury Lane production, Sarah Siddons, and Elizabeth Younge. The first known professional performance of the play in the American Colonies was in Philadelphia on 26 December 1768, performed by the Hallam Company using the Aaron Hill version. The company took the play to New York City in 1769 and after the end of the Revolutionary War sporadically revived it there and in Philadelphia. The first professional performances after the hostilities ended were given in Baltimore in April 1782 by the Thomas Wall Company. Although the professional theatres were closed during the War, the play proved popular with the British Army. General Burgoyne, himself a playwright, produced Zara with military actors in British-occupied Boston in 1775 and four times in occupied New York between 1780 and 1781.
 Passage 2:The wintering migrant birds which flock to the sanctuary were recorded at different periods during the winter months. The early arrivals in October were gadwall (Aythya ferina), northern pintail (Anas acuta), northern shoveller (Anas clypeata), common teal (Anas crecca), common pochard (Aythya ferina), and common coot (Fulica atra). The birds recorded during November were mallard (Anas platyrhynchos), spot-billed duck (Anas poecilorhyncha), and knob-billed duck (Sarkidiornis melanotos). The departure of the birds from the sanctuary was also noted in different months, towards the end of the winter season. The summer birds recorded were the lesser whistling duck (Dendrocygna javanica) and the cotton teal (Nettapus coromandelianus).
 Passage 3:After three months at the Fleet Airborne Electronics Training School in San Diego, California, Carpenter went to a Lockheed P-2 Neptune transitional training unit at Whidbey Island, Washington, after which he was assigned to Patrol Squadron 6 (VP-6), based at Naval Air Station Barbers Point, Hawaii, in November 1951. On his first deployment, Carpenter flew on reconnaissance and anti-submarine warfare missions from Naval Air Station Atsugi in Japan during the Korean War. On his second deployment, forward-based at Naval Air Facility Adak, Alaska, he flew surveillance missions along the Russian and Chinese coasts. For his third and final deployment, he was based on Guam, flying missions off the coast of China. He was designated as patrol plane commander, the only one in VP-6 with the rank of lieutenant (junior grade)—all the rest held higher rank. 

Output:
3