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.

Let me give you an 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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The answer to this example can be: 1
Here is why: The question refers to the 704th unit and task about war which is decribed by Passage 1.

OK. solve this:
Question: How many years did the Czech Legion fight during the Russian Civil War? Passage 1:George W. Bush used "I Won't Back Down" at campaign events during the 2000 presidential campaign but was compelled to stop using the song after receiving a cease and desist letter from Petty's publisher. Petty then went on to perform the song at Al Gore's home after Gore conceded the election to President Bush. Jim Webb used the song for his successful bid for one of Virginia's U.S. Senate seats in 2006, as did Hillary Clinton during the 2008 Democratic presidential primary campaign. The song was also used at campaign events for Congressman Ron Paul of Texas during the 2008 Republican presidential primary campaign, as well as for events for his Campaign for Liberty. The song was also played at an event for Republican Connecticut gubernatorial nominee, Tom Foley. The song was also played at the 2012 Democratic National Convention after speech delivered by President Bill Clinton, in which President Barack Obama came out on stage to salute him.
Passage 2:In December 1969, Presley called Porter to ask him to fix the sound for him in the main showroom at the International Hotel (renamed the Las Vegas Hilton two years later); he said he could not hear himself the last time he sang there, and a new run was scheduled for January. Porter went to see Presley's first rehearsal there, and found three stage monitors hanging high above the stage, with only one working. The hotel's engineers did not get the other two to work, so Porter had some of his own Shure Vocal Master loudspeakers brought over from the recording studio. He laid the column loudspeakers on their sides at the front lip of the stage and propped them up to aim at Presley, who was very happy with the result. Presley insisted upon having Porter mix his live show in January even though he was a recording engineer with no previous experience in live sound. Porter quickly learned about acoustic feedback during the first song, but backstage after the show, film stars and musical artists kept complimenting Presley, telling him that Porter's concert sound was "just like the album". Porter mixed Presley's live concerts from then on. Presley paid Porter well for a touring sound engineer; a 1974 contract for nearly two weeks of touring during SeptemberOctober netted Porter $2,600, an amount equivalent to $ in current value. Porter recorded several of these shows in the mid-1970s, released as albums, and witnessed firsthand Presley's physical decline from drug abuse. In 1975, Presley's doctors advised him to exercise more, so he had a racquetball court built at his mansion Graceland. Porter designed and supervised the installation of a powerful high-fidelity Electro-Voice loudspeaker sound system for the racquetball court and an adjoining lounge. On tour, Porter specified the best-sounding, most roadworthy equipment that existed: he used a Midas PRO4 mixing console and UREI equalizers. The tour was supported by Clair Brothers, who supplied all the audio gear and a monitor engineer, Bruce Jackson, who designed a powerful stage monitor system for Presley's show. In August 1977, Porter was changing planes in Boston to fly to Portland, Maine, to mix a Presley concert when he received a phone call informing him that the singer had died. He attended Presley's heavily guarded funeral ceremony at Graceland. Between Presley appearances, Porter also handled sound duties for Ann-Margret in Las Vegas and on the road, under the business name Captain Audio Productions. He consulted on television specials for Ann-Margret and for Bob Hope in 19721973.
Passage 3:After military service in the Imperial Russian Army in World War I, where he reached the rank of a colonel, he joined the 1st Polish Corps of General Jozef Dowbor-Musnicki in western Russia from December 1917 until the Germans forced its dissolution in July 1918. He helped Walerian Czuma organise 1st Kosciuszko regiment at Samara in August 1918 which later formed the 5th Rifle Division in Siberia (sometimes known as the Polish Legion or the Siberian Division) which fought alongside the Czech Legion and the White movement in the Russian Civil War. When the White government of Admiral Aleksandr Kolchak collapsed in December 1919, the Polish Legion joined the general retreat along the Trans-Siberian Railway, until it was surrounded by the Red Army east of Krasnoyarsk in early January 1920. Refusing to surrender, Rumsza led 900 officers and men on an ice march through the taiga slipping through Bolshevik forces until they reached Irkutsk. From there they managed to escape to Harbin in White-controlled Manchuria, and thence to Vladivostok. Rumsza's force arrived at Gdansk (Danzig) in Poland in June 1920 and volunteered to fight in the Polish-Soviet War which had just broken out.

Answer:
3