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-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.
.
Example solution: 1
Example explanation: The question refers to the 704th unit and task about war which is decribed by Passage 1.

Problem: Question: In which country was Sergey's family once royalty? Passage 1:Elphin has historically been an important market town and the diocesan centre for the Diocese of Elphin. St Patrick is believed to have visited Elphin, consecrated its first church and ordained its first bishop, Asicus (subsequently the patron saint of Elphin). Information supporting the visitation of St Patrick is to be found in two important memorials of early Irish hagiography, the Vita Tripartita of St Patrick, and the "Patrician Documents" in the Book of Armagh. On his missionary tour through Connacht in 434 or 435, St Patrick came to the territory of Corcoghlan, present day Elphin. The chief of that territory, a noble Druid named Ono, gave land and afterwards his castle or fort to St Patrick to found a church and monastery. The place, which had hitherto been called Emlagh-Ono (a derivation of its owners name) received the designation of Ail Finn, which means "rock of the clear spring". It derives from a story of St Patrick raising a large stone from a well opened by him in the land of Ono and placed on its margin. A copious stream of crystal water flowed from the well and continues to flow through Elphin to this day. St Patrick built a church called Tempull Phadruig (Patrick's church) and established an Episcopal See in Elphin. St Asicus remained as bishop of Elphin. St Patrick also founded an episcopal monastery or college at Elphin, believed to be one of the first monasteries founded by him. In pre-Reformation times, Elphin was host to a large number of religious orders and was a religious centre of international significance. This is supported by the appearance of Elphin in a number of pan-European maps in the Middle Ages. 
 Passage 2:Born in 1909 in the family of Orthodox princes Obolensky, from 1925 in exile in France, where, together with his father Nikolai Leonidovich Obolensky adopted Catholicism. He went to the Benedictines, where studied philosophy, and in 1943 he defended his doctoral degree from Pontifical Atheneum of St. Anselm in Rome. From 1935 he studied at Russicum. Ordained priest in 1940, Obolensky was sent to Paris, where he taught at Saint George Boarding in Meudon. He was also a member of the Congress of Russian Catholics in 1950 in Rome. Obolensky taught courses on the history of Russian literature and philosophy in Rome, Meudon and Bergamo. He worked as an expert on the Soviet Union in NATO. He was also author of books on the Soviet economy, translated the correspondence of Joseph Stalin, Franklin Roosevelt and Winston Churchill, and the memoirs of Georgy Zhukov and was engaged in the Soviet dissident literature. He died in 1992 in Belgium, the home of his sister.
 Passage 3:On 22 June 2018, Miller signed for League Two club Port Vale on a two-year contract for an undisclosed fee. Manager Neil Aspin had previously tried to sign him at F.C. Halifax Town and Gateshead. He was unable to play in the club's 2018–19 pre-season friendlies because of an unresolved disciplinary issue with The Football Association. He scored a goal and won a penalty on his debut on the opening day of the new season on 4 August, helping the "Valiants" to record a 3–0 victory over Cambridge United at Vale Park. His strike – a direct free-kick which he also won himself – was listed in the Daily Mail as the League Two goal of the weekend. However he was dropped after failing to score in the rest of the month, though impressed coach Lee Nogan with his performances off the bench, who said Miller just needed to rebuild his confidence following the goal drought. Aspin then switched to a 3–4–3 / 5–4–1 formation, leaving Miller to compete with Ben Whitfield for a place at wide midfield. Miller fell out of first-team contention by November, leaving Aspin to comment that "you have to be perfectly honest, he has not done the job at the moment that I brought him to do and, like I say, he has to do better." He was recalled to the first-team on 19 January, following an injury to Tom Pope, and scored his second league goal for the club to secure a 1–0 win at Crawley Town. However he was shown a straight red card in a 1–0 home defeat to Carlisle United seven days later. An injury to Pope saw new manager John Askey return Miller to the starting eleven on 9 March, and he doubled his league tally for the season with both Vale goals in a 2–1 win over promotion-chasing Mansfield Town; his performance saw him named on the EFL team of the week. He ended the campaign with six goals in 22 starts and 13 substitute appearances. His contract was terminated by mutual consent on 27 June, and the club refused to comment on the reasons behind his departure. Miller wrote on Twitter that he was "Sorry I didn't fulfill my potential but I've found the last two years very difficult. I hope I leave you with some good memories."
Solution: 2