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-Lo 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 (18941973) 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: When was the Pierpont Morgan Library built? Passage 1:The Abbasid-era geographers report that the town was the centre of a flourishing agricultural region, with a number of dependent suburbs such as Qasr-i Ahnaf. According to al-Muqaddasi, who wrote in ca. 980, the locals were kin of the people of Gharjistan, and the town was a dependency of the rulers, or Shirs, of Gharjistan. A section of the Harbiyya district of the Round city of Baghdad was named Marwrudiyya () after the people from this city. The town continued to flourish under the Seljuk Empire, when the Seljuk ruler Ahmad Sanjar built the city a new wall, some 5,000 paces in circumference. The town and the surrounding area suffered during the constant conflicts between the Khwarazmshahs and the Ghurids in the late 12th century, and a battle was fought there between the Ghurid ruler Ghiyath al-Din Muhammad (r. 11631202) and his Khwarazmian rival Sultan Shah (r. 11721193) in 1190. Although the town appears to have escaped the destruction of Marw al-Shahijan by the Mongols, it fell into ruin under the Timurids and was largely abandoned.
Passage 2:The Midnighters were an American R&B group from Detroit, Michigan. They were an influential group in the 1950s and early 1960s, with many R&B hit records. They were also notable for launching the career of lead singer Hank Ballard and the worldwide dance craze the Twist. Between 1953 and 1962 the Midnighters had almost two dozen hits on the U.S. Pop & R&B charts. Their big hits included the million-selling Billboard Top 10 pop hits "Finger Poppin' Time" (for which they received a 1961 Grammy Award nomination), and "Let's Go, Let's Go, Let's Go". The Midnighters also had 13 Top 10 R&B hits, including three that reached number 1. Their Top 10 R&B hits included "Work with Me, Annie", "It's Love Baby (24 Hours a Day)", "Annie Had a Baby", "The Hoochi Coochi Coo", "Teardrops on Your Letter", "Get It", "The Float" and "Nothing but Good". They received the Rhythm and Blues Foundation's prestigious Pioneer Award in 1992 and were inducted into the Vocal Group Hall of Fame in 1999. The Midnighters are also noted for achieving a music industry milestone in 1960, by becoming the first group in history to place 3 singles in the Billboard Hot 100 at the same time. The group's lead singer, Hank Ballard, was inducted into the Rock and Roll Hall of Fame in 1990. The Midnighters as a group were inducted into the Rock and Roll Hall of Fame on April 14, 2012.
Passage 3:Dorothy Eugenia Miner was born in New York City, New York, on 4 November 1904. She attended the Horace Mann School before she enrolled in Barnard College in 1922, receiving her bachelor's degree four years later. Miner became the first Barnard International Fellow and studied at the Bedford College of the University of London. She studied medieval manuscript illumination with Meyer Schapiro at Columbia University in 192829 and received a fellowship to continue working on her dissertation on a Carolingian Apocalypse manuscript the following year. Miner was hired by the Pierpont Morgan Library to prepare an exhibition of illuminated manuscripts in 193334 and the director of the library, Belle da Costa Greene, recommended her for the position of keeper of manuscripts at the Walters Art Gallery, in Baltimore, Maryland. She got the job and became of the first professionally trained art historians working in an American museum. She was also curator of Islamic and Near Eastern Art as well as the head of the reference library for several years. From 1938 to 1969 Miner edited the Journal of the Walter Gallery and many catalogues published by the museum. She died of cancer in Baltimore in May 1973.

Answer:
3