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

Now, solve this: Question: How old was Robert Guiscard when he defeated the papal troops of Pope Leo IX? Passage 1:The movement of Protestant Reformation, led by Martin Luther in the Holy Roman Empire and John Calvin in France, had an important impact on music in Paris. Under Calvin's direction, between 1545 and 1550 books of psalms were translated from Latin into French, turned into songs, and sung at reformed services in Paris. The Catholic establishment reacted fiercely to the new movement; the songs were condemned by the College of Sorbonne, the fortress of orthodoxy, and in 1549 one Protestant tailor in Paris, Jacques Duval, was burned at the stake, along with his song book. When the campaign against the new songs proved ineffective, the Catholic Church, at the Council of Trent (1545-1563) which launched the Counter-Reformation, also launched a musical counter-reformation. It was calling for an end to complex but unintelligible chants, simpler melodies, and more serious and elevated lyrics.
 Passage 2:San Severo lies on the Daunia, and various Neolithic settlements have been detected. In the early Middle Ages, the area was not inhabited or defined. Between the Lombards and the Byzantine ages, the Benedictine monastery at Cassino was established, and with it, the cult of the apostle of Saint Severinus of Noricum. San Severo was founded in the 11th century around a small church built by the Benedictine monks from Montecassino. It rapidly developed as a trade town. In 1053, it was the scene of the historical victory of Robert Guiscard over the papal troops under Pope Leo IX (see Battle of Civitate). In the eleventh century, San Severo was the route of the Via Sacra Langobardorum and a primitive church arose dedicated to Saint Severino, from which continued an influx of pilgrims to Monte Sant'Angelo and movement of people and goods. The town was therefore called Castellum Sancti Severini ("Fortified Town of San Severo").
 Passage 3:Parkinson divorced in 1952 and he married the writer and journalist Ann Fry (1921–1983), with whom he had two sons and a daughter. In 1958, while still in Singapore, he published his most famous work, Parkinson's Law, which expanded upon a humorous article that he had published in the Economist magazine in November 1955, satirising government bureaucracies. The 120-page book of short studies, published in the United States and then in Britain, was illustrated by Osbert Lancaster and became an instant best seller. It explained the inevitability of bureaucratic expansion, arguing that 'work expands to fill the time available for its completion'. Typical of his satire and cynical humour, it included a discourse on Parkinson's Law of Triviality (debates about expenses for a nuclear plant, a bicycle shed, and refreshments), a note on why driving on the left side of the road (see road transport) is natural, and suggested that the Royal Navy would eventually have more admirals than ships. After serving as visiting professor at Harvard University in 1958, the University of Illinois and the University of California, Berkeley in 1959–60, he resigned his post in Singapore to become an independent writer. To avoid high taxation in Britain, he moved to the Channel Islands and settled at St Martin's, Guernsey, where he purchased Les Caches Hall and later restored Annesville Manor. His writings from this period included a series of historical novels featuring a fictional naval officer from Guernsey, Richard Delancey, during the Napoleonic era.

Solution:
2