You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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

New input: Question: How many students did Northwestern University have enrolled the year that Margaret Danner was born? Passage 1:In October 1916, shortly after Romania entered World War I, he began studying at the reserve officers' school in Botoșani. From spring 1917 to March 1918, he fought on the front as a student master sergeant. He later recalled his wartime experiences in Amintiri. Notații autobiografice, pointing out the absurdity and uselessness of many of the army's actions. He found that officers, rather than judging based on circumstances, hid behind regulations, and that the troops' activities were subject to little real oversight. In October 1918, near the war's end, he enrolled in the literature and philosophy faculty of Bucharest University, graduating in 1922. Initially intending to study sociology, he changed his mind when he found that his professor Ion A. Rădulescu-Pogoneanu did not know the material. Bagdasar then opted for the history of philosophy, taught by a youthful Mircea Florian, whom he found erudite. While a student, he was an editor for Gazeta Transilvaniei, a newspaper based in Brașov, in the newly acquired Transylvania region. Following graduation and with the help of Mihai Popovici, he earned a scholarship at the University of Berlin, where he studied from 1922 to 1926. At Berlin, he took courses with Carl Stumpf, Heinrich Maier and Max Dessoir, and was active in the Kant-Gesellschaft society. He also acquired a solid grounding in Kantianism. He took his doctorate in 1926; it was titled Der Begriff des theoretischen Wertes bei Rickert ("The Notion of Theoretical Value in Rickert").
 Passage 2:Olubowale Victor Akintimehin was born on September 21, 1984, in Northwest, Washington, D.C.. His parents were both from the Yoruba ethnic group of southwestern Nigeria, and both of them came from Austria to the United States in 1979. Wale's family first lived in Northwest, Washington, D.C. and then moved to Montgomery County, when Wale was at the age of 10. In 2002, he graduated from the Quince Orchard High School in Gaithersburg, Maryland, and moved to Largo, Maryland in Prince George's County. Wale attended Robert Morris University and Virginia State University on football scholarships, then transferred to Bowie State University. However, he dropped out due to academic reasons. Wale's love of the game of football and the Washington Redskins has led to a longstanding rumor that Wale had a tattoo of tight end Chris Cooley. He's also the cousin of an actor Gbenga Akinnagbe, who is best known as for playing Chris Partlow on HBO's The Wire. Wale's first recorded track, called "Rhyme of the Century", became his first song to ever be played on the local radio. In 2006, he was featured in the "Unsigned Hype" column of The Source magazine, and later signed to a local label, Studio 43. The track, called "Dig Dug (Shake It)" became popular in Washington, D.C., Maryland and Virginia, and was a tribute to Ronald "Dig Dug" Dixon, who was a percussion player for the go-go band Northeast Groovers. The song became the most requested song by a local artist in Washington D.C. radio history and Wale was the first local artist to get some BDS spins since DJ Kool in the early 1990s. The song was included in Wale's first mixtape, Paint a Picture.
 Passage 3:Born in 1915, Margaret Esse Danner came of age in Chicago during the Great Migration. Sources place her birth in Pryorsburg, Kentucky, in 1915, although she adamantly claimed Chicago as her birthplace. In eighth grade, she won first prize in a school contest for "The Violin", a poem describing Stradivarius and Guarnerius violins. Danner's college education included courses at Loyola University, Northwestern University, YMCA College, and the newly founded Roosevelt College. Perhaps equally significant was her education in the African-American cultural community of Chicago's South Side, which in the 1930s and 1940s harbored grassroots cultural institutions and informal circles devoted to politics, education, art and literature and often tied to the Communist Popular Front. Although Danner stayed detached from Communism and would eventually oppose all radical politics, she participated in various South Side groups, including Inez Cunningham Stark's poetry workshop at the South Side Community Art Center, along with Gwendolyn Brooks and Margaret Goss Burroughs, her "sometime friends (and rivals)." In 1946, Danner founded Art Associates to gather and promote Chicago's black writers and poets. She counted as friends the poet and critic Edward Bland, as well as Hoyt Fuller, who would head the revived Negro Digest (later Black World) beginning in 1951.

Solution:
3