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-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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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: Which country did Innocent Oula return to after Somalia? Passage 1:NY 104 begins at NY 384 just east of the Rainbow Bridge in downtown Niagara Falls and heads north and east across the county on its way toward Rochester. From Niagara Falls, the route travels in north-northeasterly direction along the Niagara Gorge as it heads into Lewiston and connects to the Robert Moses State Parkway and serves the Niagara Power Visitors Center, known as the Power Vista. Just north of the Power Vista, NY 104 meets I-190 at exit 25 via Upper Mountain Road (unsigned NY 954P). Continuing on, the highway has a junction with nearby NY 265 before descending the Niagara Escarpment toward the village of Lewiston. As the road heads down the ridge, it intersects the western terminus of NY 18 by way of an interchange.
 Passage 2:Around this time Gussow, a Princeton graduate and English M.A. student at Columbia University, first saw Magee and his trio performing on the corner of 114th Street and Broadway. (Gussow relates the story in his 1998 blues memoir, Mister Satan's Apprentice.) Gussow, a guitarist and harmonica player whose performing experience had previously been limited to a handful of high school and college bands, was galvanized by the encounter. After dropping out of grad school, Gussow spent several years as a part-time street performer in New York and Europe. Gussow's transformation from an academic to a blues player was facilitated by lessons he took from his mentor, New York harmonica virtuoso Nat Riddles, who had performed and recorded with Larry Johnson, Odetta, and others, and by his acculturation into the jam session life at Dan Lynch, a storied East Village juke joint.
 Passage 3:Innocent Oula joined the National Resistance Army in 1986 at the rank of captain. He rose through the ranks and has served as a member of UPDF delegation during the ill-fated Juba Peace Talks, at the rank of lieutenant colonel. At the level of colonel, in 2009, he served at the director of training for the UPDF 2nd Division, based at Mbarara, in Western Uganda. From 2010 until 2011, he served as the Chief of Staff of AMISOM, based in Mogadishu, Somalia. On his return from Somalia, he was posted to the 4th UPDF Division headquarters in Gulu, as the commanding officer. He later was appointed chief of personnel and administration in the UPDF, based at the Mbuya Barracks. In January 2014, he was elected to the Parliament of Uganda, as a UPDF representative. In November 2014, he was promoted to the rank of brigadier, along with more than 1,300 UPDF officers who received promotions at the same time.

Answer:
3