Given the task definition, example input & output, solve the new input case.
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.
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Output: 1
The question refers to the 704th unit and task about war which is decribed by Passage 1.

New input case for you: Question: What factions were involved in the Norman Invasion? Passage 1:The earliest evidence of human presence in Ireland is dated at 10,500 BC (12,500 years ago). Gaelic Ireland had emerged by the 1st century AD. The island was Christianised from the 5th century onward. Following the 12th century Norman invasion, England claimed sovereignty. However, English rule did not extend over the whole island until the 16th–17th century Tudor conquest, which led to colonisation by settlers from Britain. In the 1690s, a system of Protestant English rule was designed to materially disadvantage the Catholic majority and Protestant dissenters, and was extended during the 18th century. With the Acts of Union in 1801, Ireland became a part of the United Kingdom. A war of independence in the early 20th century was followed by the partition of the island, creating the Irish Free State, which became increasingly sovereign over the following decades, and Northern Ireland, which remained a part of the United Kingdom. Northern Ireland saw much civil unrest from the late 1960s until the 1990s. This subsided following a political agreement in 1998. In 1973 the Republic of Ireland joined the European Economic Community while the United Kingdom, and Northern Ireland, as part of it, did the same.
 Passage 2:In Morning, a lady makes her way to church, shielding herself with her fan from the shocking view of two men pawing at the market girls. The scene is the west side of the piazza at Covent Garden, indicated by a part of the Palladian portico of Inigo Jones's Church of St Paul visible behind Tom King's Coffee House, a notorious venue celebrated in pamphlets of the time. Henry Fielding mentions the coffee house in both The Covent Garden Tragedy and Pasquin. At the time Hogarth produced this picture, the coffee house was being run by Tom's widow, Moll King, but its reputation had not diminished. Moll opened the doors once those of the taverns had shut, allowing the revellers to continue enjoying themselves from midnight until dawn. The mansion with columned portico visible in the centre of the picture, No. 43 King Street, is attributed to architect Thomas Archer (later 1st Baron Archer) and occupied by him at the date of Hogarth's works. It was situated on the north side of the piazza, while the coffee house was on the south side, as depicted in Hogarth's original painting. In the picture, it is early morning and some revellers are ending their evening: a fight has broken out in the coffee house and, in the melée, a wig flies out of the door. Meanwhile, stallholders set out their fruit and vegetables for the day's market. Two children who should be making their way to school have stopped, entranced by the activity of the market, in a direct reference to Swift's A Description of the Morning in which children "lag with satchels in their hands". Above the clock is Father Time and below it the inscription Sic transit gloria mundi. The smoke rising from the chimney of the coffee house connects these portents to the scene below.
 Passage 3:Michael Fitzgerald, a professor of child and adolescent psychiatry, published a cornucopia of pathographies of outstanding historical personalities, mostly stating that they had Asperger syndrome, which is on the autism spectrum. In his 2004 published anthology Autism and creativity, he classified Hitler as an "autistic psychopath". Autistic psychopathy is a term that the Austrian physician Hans Asperger had coined in 1944 in order to label the clinical picture that was later named after him: Asperger syndrome, which has nothing to do with psychopathy in the sense of an antisocial personality disorder. Fitzgerald appraised many of Hitler's publicly known traits as autistic, particularly his various obsessions, his lifeless gaze, his social awkwardness, his lack of personal friendships, and his tendency toward monologue-like speeches, which, according to Fitzgerald, resulted from an inability to have real conversations.

Output:
1