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: In what year did the Ford Mustang appear as a race car in the United States? Passage 1:Appearing at the Gasteig in 2005, she performed Chopin's Piano Concerto in E minor with the Münchener Kammerorchester, conducted by Christoph Poppen. In 2008, Babor appeared in a recital at the Ushuaia festival playing works by Beethoven, Prokofieff, Schubert and Ginastera, and Mozart's Piano Concerto in C major, K. 482. In 2009, as part of the project Musik Werkstatt Jugend (youth music workshop), she played Rachmaninoff's Piano Concerto in C minor with the ensemble interculturel in concerts in Munich's Herkulessaal and in Rouen. In 2011, she was the pianist in a concert at the Gasteig concluding a festival to honour the 200th birthday of Franz Liszt on October 22. The program Hommage à Liszt juxtaposed chamber music by Liszt with that by Graham Waterhouse. The music was scored for piano solo up to piano and string quartet, including the premiere of Rhapsodie Macabre.
 Passage 2:Beechey began racing at the age of 22 in a Ford Customline V8. He came to prominence only a year later when he won the Olympic Touring Car Race at Albert Park, a support event at the Australian Grand Prix meeting which was held in conjunction with the 1956 Melbourne Olympic Games. As the expense of running this and two subsequent Customline V8s proved too prohibitive he reverted to a Holden 48-215 in 1959. After becoming part of David McKay’s Scuderia Veloce team he again returned to V8s, developing a Chevrolet Impala with which he won the New South Wales Touring Car Championship at Catalina Park. He progressed to a Ford Galaxie owned by Len Lukey and was then instrumental in forming the Neptune Racing Team in 1964. He raced a Holden EH S4 as part of that team alongside Jim McKeown’s Lotus Cortina and Peter Manton’s Morris Cooper S. He subsequently developed and raced a series of V8 powered Touring Cars with which he contested the Australian Touring Car Championship and other events. The first Ford Mustang to race in Australia was followed by a Chevrolet Chevy II Nova, a Chevrolet Camaro, a Holden Monaro GTS 327 and a Holden Monaro GTS 350.
 Passage 3:Ray Arnott played in a number of major Australian groups: he replaced founding drummer Mark Kennedy in Spectrum and played with them from 1971 until the group disbanded in 1973; this was followed by a brief stint in the short-lived "supergroup" Mighty Kong (which included former Cam-Pact/Co. Caine guitarist Russell Smith and former Daddy Cool members Ross Wilson and Ross Hannaford. This was followed by stints with The Dingoes (1973–1976), various solo projects (1978–80), Cold Chisel (1983–84) and Jimmy Barnes Band (1984–85). In 1969, Glass scored the role of Berger in the original Australian stage production of Hair, and performed on the award-winning original cast recording. After leaving that production, in the early 1970s (with David Pepperell he founded the pioneering Melbourne import record store "Archie & Jughead". In 1977 Glass established a new store and record label, Missing Link, which re-issued Cam-Pact material including a compilation album, Psychedelic Pop 'n' Soul 1967-69 (October 2002) alongside many other notable releases, including the earliest recordings by The Go-Betweens and The Birthday Party. Chris Löfvén became a film maker, creating pioneering Australian "film clips" (music videos) for Daddy Cool and Spectrum; he also directed a feature film, Oz (1976), alongside his continuing music work (often with Keith Glass). Russell Smith co-founded progressive rockers Company Caine (1970–75) and was also (with Arnott) a member of the short-lived Mighty Kong. Stockley was a founding member of early Australian "supergroup" Axiom (1969–71) and The Dingoes (1973–1978, 2009–present). Robert Lloyd went on to study and teach music and become a successful composer, poet, songwriter and recording artist.

Output:
2