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-Lo 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 (18941973) 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: How long had the Royal Opera Covent Garden been in operation when Sarah Fox made her debut as Woglinde? Passage 1:The Battle of Chongju (2930 October 1950) took place during the United Nations Command (UN) offensive towards the Yalu River, which followed the North Korean invasion of South Korea at the start of the Korean War. The battle was fought between Australian forces from 3rd Battalion, Royal Australian Regiment (3 RAR) and the 17th Tank Brigade of the Korean People's Army (KPA) for control of Chongju, North Korea and the surrounding area. After detecting a strong KPA armoured force equipped with T-34 tanks and SU-76 self-propelled guns on a thickly wooded ridgeline astride the line of advance, the Australians launched a series of company attacks with American M4 Sherman tanks and aircraft in support. Despite heavy resistance the KPA were forced to withdraw and the Australians captured their objectives after three hours of fighting.
Passage 2:In 2000, Fox made her debut for the Glyndebourne Festival as Karolka (Jenufa), returning in 2002 as Zerlina (Don Giovanni) and in 2003 as Susanna (Le nozze di Figaro). Of her Susanna in Le Nozze di Figaro at the Glyndebourne Festival Barbarina Diana, writing in Il giornale della musica described her performance at Glyndebourne as "a delight for the eye and heart, whose voice, fresh and crystal clear is blessed with a rare beauty accompanied by a strong musicality: 'Deh vieni' interpreted without affectation, directed to her beloved, takes your breath away". With Glyndebourne on tour she has sung Marzelline (Fidelio) and Miss Wordsworth (Albert Herring). In 2004, she made her debut with the Royal Opera Covent Garden as Woglinde (Das Rheingold), returning to the house in 2005 as Waldvogel (Siegfried) and in 2006 as Woglinde (Gotterdammerung). In 2007 she sang Zerlina (Don Giovanni) and Woglinde (Das Rheingold and Gotterdammerung; in 2008, Lucy Lockitt in The Beggars Opera and in 2009, Asteria in Handel's "Tamerlano." Further British engagements include Ann Page (Sir John in Love) with English National Opera, Merab (Saul), Musetta and Mimi (La Boheme) with Opera North, and Servilia (La clemenza di Tito) with Welsh National Opera. At the Edinburgh Festival, her roles have included Iphis (Jephtha) and Cleofide (Poro).
Passage 3:Jackson was a member of the council of IPPA, a forerunner of Pact, the body which established terms for trade between independent producers and the BBC and other broadcasters. PJP was eventually taken over by Noel Gay Television, a company chaired by the British entertainment executive, Bill Cotton. Jackson served as the Managing Director and the company produced Red Dwarf, the long-running and internationally successful comedy series, the pilot episode of Bottom (Rik Mayall and Adrian Edmonson) and, working with LWT, the hugely influential Channel Four variety show, Saturday Live. Saturday Live featured such comedy stars as Lenny Henry, Pamela Stephenson, Michael Barrymore, Peter Cook and Barry Humphries and brought to prominence talents such as Ben Elton (as a performer), Fry and Laurie, Harry Enfield and Julian Clary. The company also held the contract to provide all entertainment programming for the short lived UK satellite service, British Satellite Broadcasting and produced shows featuring then unknown names such as Armando Ianucci, Steve Coogan, Lee Evans and Jack Dee, as well as The Happening, a precursor to the long-running BBC show Later... with Jools Holland. In 1988 Jackson also co-produced the Oscar-winning short film, The Appointments of Dennis Jennings, starring Steven Wright and Rowan Atkinson.

Output:
2