You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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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Solution: 1
Why? The question refers to the 704th unit and task about war which is decribed by Passage 1.

New input: Question: When did the sovereign entity that built the Victor Emmanuel Railway begin? Passage 1:"Learn the Hard Way" is the album's fourth track. It is the third song on the album, and shares similarities with the song "Never Say Never". The Guy Roche-produced "Almost Doesn't Count" is the fifth track. Brandy performed the song in the 1999 film Double Platinum, starring Diana Ross and herself. The international single "Top of the World" is the album's sixth track. It is a collaboration with Mase and the song talks about Brandy as a popstar just trying to be her and not feeling like being in her own world. In the music video, directed by Paul Hunter, Brandy was featured incurring various supernatural phenomena. She spontaneously floated in the air, flipping and somersaulting above random objects; telephone poles and vehicles, as people stopped to stare. These strange phenomena also included balancing herself vertically and horizontally alongside skyscrapers and buildings. The Darkchild-produced "U Don't Know Me (Like U Used To)", which is the album's seventh and final single, is noted for its remix version with Shaunta and Da Brat. The remix was released as the lead single to the same-named EP. "Never Say Never", also produced by Rodney Jerkins, is the eighth song of the album. "Never Say Never" was released as a Germany single in 2000. "Truthfully", a ballad about a broken relationship, was penned by former Boyz II Men member, singer-songwriter Marc Nelson. Recorded in a single take, it took Nelson five different sessions to get Norwood in the recording studio as she felt initially nervous about working with him. Main production on the song was helmed by Harvey Mason, Jr. who received his first major placement as a producer on "Truthfully". Mason was consulted by Jerkins after he had shopped around several tracks for record executives.
 Passage 2:In 1926, the opera was first presented at the Salzburg Festival, staged by Lothar Wallerstein in Viennese settings, twice conducted by Clemens Krauss and once by Richard Strauss himself. Lotte Lehmann was Salzburg's first Ariadne. Wallerstein was also the stage director of the second Viennese production in 1935, with settings by Oskar Strnad and costumes by Ladislaus Czettel. Josef Krips conducted. There were 38 performances until September 1943. Three months later a new production by Heinz Arnold was presented, with settings by Wilhelm Reinking and conducted by Karl Böhm. The cast featured Maria Reining as Ariadne, Max Lorenz as Bacchus, Alda Noni as Zerbinetta, Irmgard Seefried as composer, Paul Schöffler as Musiklehrer, Erich Kunz as Harlekin and Emmy Loose as Najade. Due to the war this production could only be shown seven times.
 Passage 3:The Victor Emmanuel Railway, which included both the Culoz–Modane railway across Savoy and the Turin–Modane railway across Piedmont, was largely built in the 1850s by the Kingdom of Sardinia and named after its king, Victor Emmanuel II. Until 1860 Sardinia included both Savoy and Piedmont. The line from Turin to Susa was inaugurated on 22 May 1854. Work on the tunnel began on 31 August 1857 and was completed in September 1871. Work had begun on the line between Bussoleno and Bardonecchia in 1867 and was completed at the same time as the tunnel. The tunnel and line were opened on 16 October 1871. By that time, the Savoy side of the tunnel had become part of France. The decision of the engineers to begin the line at Bussoleno in order to reduce the gradient on the climb near Meana was much criticized for bypassing the city of Susa, which was left isolated on a short branch line. The opening of the tunnel also led to the closure of the short-lived Mont Cenis Pass Railway. In 1865 the line became part of the network of the Società per le strade ferrate dell'Alta Italia (Upper Italian Railways, SFAI) on its foundation in 1865 and was taken over by the Rete Mediterranea (Mediterranean Network) in 1885. Finally in 1905 it became part of the Ferrovie dello Stato network.

Solution:
3