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 was the inaugural year of the air race series that Rust also hosted and commentated? Passage 1:Whale was born into a large family in Dudley, Worcestershire. He discovered his artistic talent early on and studied art. With the outbreak of World War I he enlisted in the British Army and became an officer. He was captured by the Germans and during his time as a prisoner of war he realized he was interested in drama. Following his release at the end of the war he became an actor, set designer and director. His success directing the 1928 play Journey's End led to his move to the US, first to direct the play on Broadway and then to Hollywood, California, to direct films. He lived in Hollywood for the rest of his life, most of that time with his longtime companion, producer David Lewis. Apart from Journey's End (1930), which was released by Tiffany Films, and Hell's Angels (1930), released by United Artists, he directed a dozen films for Universal Pictures between 1931 and 1937, developing a style characterized by the influence of German Expressionism and a highly mobile camera.
 Passage 2:Caisse de dépôt et placement du Québec (CDPQ; lit. Quebec Deposit and Investment Fund, also referred to in English-language media as the Caisse) is an institutional investor that manages several public and parapublic pension plans and insurance programs in Quebec. It was founded in 1965 by an act of the National Assembly under the government of Jean Lesage. It is the second-largest pension fund in Canada, after the Canada Pension Plan (CPP). As at December 31, 2018, CDPQ managed assets of C$309.5 billion invested in Canada and elsewhere. CDPQ is headquartered in Quebec City in the Price building and has its main business office in Montreal at Édifice Jacques-Parizeau.
 Passage 3:In 1997 he was hired by Ten to host the Australian Super Touring Championship for 2-litre Touring Cars - a position previously held by his close friend Leigh Diffey, who had moved on to Network Ten's V8 Supercar coverage. Rust commentated the Australian Super Touring Championship for 2 years before starting work as V8 pit reporter late in 1998. He was a part of Ten's V8 coverage for almost 10 years - even hosting and anchoring the commentary on occasions. During this period the station won numerous Logie Awards for its broadcast of the famous Bathurst 1000 and Rust developed a reputation as a pit specialist also working on the Gold Coast Indy 300 and the Australian Grand Prix in Melbourne. Despite an offer to join the Seven Network in 2007, Rust stayed with Ten to front the station's MotoGP and F1 broadcasts and its long running magazine motorsport show RPM. He also hosted and commentated Ten's coverage of the Red Bull Air Race series.

Output:
3