Detailed Instructions: 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.
See one example below:
Problem: 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
Explanation: The question refers to the 704th unit and task about war which is decribed by Passage 1.

Problem: Question: What modern day country is the Principality of Serbia? Passage 1:Naitō Yorinao was the seventh son of Naitō Yoriyasu. However, as all of his elder brothers died in childhood he became daimyō in 1859 on the retirement of his father. In 1860, he established a han school, the Shintoku-kan (進徳館) in Takatō. He served as part of the escort to Princess Kazunomiya during her travel to Edo to marry the Shogun Tokugawa Iemochi in 1861. Following the Namamugi Incident of 1862, during which British subjects were killed by the retinue of Shimazu Hisamitsu, he was ordered by the shogunate to deploy his troops to Yokohama to increase security. These troops subsequently accompanied the Shogun's forces during the First Chōshū expedition. However, with the start of the Boshin War in 1868, Takatō quickly joined the imperial side against the Tokugawa. Even so, the domain was ordered to pay 2000 ryō to the new Meiji government to help pay for war expenses. Troops from Takatō participated in the Battle of Aizu under the command of Prince Saionji Kinmochi. Yorinao was appointed imperial governor of Takatō in 1869, serving until the abolition of the han system in 1871. He relocated to Tokyo at that time, and died in 1879. His grave is at the temple of Taizō-ji in Shinjuku, Tokyo.
 Passage 2:The modern Albanian-Serbian conflict has its roots in the expulsion of the Albanians in 1877-1878 from areas that became incorporated into the Principality of Serbia. Prior to the outbreak of the First Balkan War, the Albanian nation was fighting for a national state. At the end of 1912, the Porte recognised the autonomy of Albanian vilayet. These events for Albanian autonomy and Ottoman weakness were viewed at the time as directly threatening the Christian population of the region with extermination. The Balkan League (comprising Serbia, Montenegro, Greece and Bulgaria) jointly attacked the Ottoman Empire and during the next few months partitioned all Ottoman territory inhabited by Albanians. The Kingdom of Serbia and the Kingdom of Greece occupied most of the land of what is today Albania and other lands inhabited by Albanians on the Adriatic coast. Montenegro occupied a part of today's northern Albania around Shkodër. The Serbian army in the region viewed its role as protecting local Orthodox Christian communities and avenging the medieval battle of Kosovo, though it forced Catholic Albanians to convert to Orthodox Christianity.
 Passage 3:An ancient Amphictyony, probably the earliest centered on the cult of Demeter at Anthele or Anthela (Ἀνθήλη), which lay on the coast of Malis south of Thessaly. This was the locality of Thermopylae. Thus those living near the temple were called Amphictyones ("dwellers-round"). The immediate "dwellers-round", presumably the first members, were the small states Aeniania, Malis and Doris. Certainly Thessaly did have a share including the states of the Boeotian tribes who lived around Thessaly (perioikoi, "living around"). Boeotia and Phocis, the most remote of them may have joined during or after the "First Sacred War", which led to the defeat of the old priesthood, and to a new control of the prosperity of the oracle at Delphi. As a result of the war, the Anthelan body was known henceforth as the Delphic Amphictyony and became the official overseer and military defender of the Delphic cult. The name of Hellenes, which was originally the name of a Boeotian tribe in Thessalic Phthia, (Achaea Phthiotis) may likely be related to the members of that league and may have been broadened to refer to all Greeks when the myth of their patriarch Hellen was invented.

Solution:
2