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: In the 1880 census which state had the largest population? Passage 1:Following the war, Walker served on the editorial staff of the Springfield Republican before using his family and military connections to gain appointment as the Chief of the Bureau of Statistics from 1869 to 1870 and Superintendent of the 1870 census where he published an award-winning Statistical Atlas visualizing the data for the first time. He joined Yale University's Sheffield Scientific School as a professor of political economy in 1872 and rose to international prominence serving as a chief member of the 1876 Philadelphia Exposition, American representative to the 1878 International Monetary Conference, President of the American Statistical Association in 1882, and inaugural President of the American Economic Association in 1886, and vice president of the National Academy of Sciences in 1890. Walker also led the 1880 census which resulted in a twenty-two volume census, cementing Walker's reputation as the nation's preeminent statistician.
 Passage 2:Louiche Mayorga played with Suicidal Tendencies from 1981 to 1988 and Los Cycos from 1984 to 1985. In 1983 he played on the self-titled "Suicidal Tendencies album" on Lisa Fancher's, Frontier Records and co-wrote four of the songs, "Two Sided Politics," "Won't Fall in Love Today," "Memories of Tomorrow" (which was covered by Slayer for their album Undisputed Attitude, but was not added to the final release) and the punk classic "Institutionalized" (which was covered by Senses Fail for the soundtrack to the video game Tony Hawk's American Wasteland ). You can also hear his voice on the answer call vocal in the opening track "Suicides an Alternative/ You'll Be Sorry." His second recording was on Suicidal Records (a label he co-founded with vocalist Mike Muir) for the "Welcome to Venice" compilation. Mayorga played on two cuts "Look Up...(The Boys Are Back) with Suicidal Tendencies, and the song "It's Not Easy" with "Los Cycos." His third in 1987 being the highly anticipated "Join the Army" on Caroline Records where he co-wrote the title track "Join the Army," and six others "The Prisoner," "War Inside My Head," (which is also featured in the game .) "Possessed to Skate" (Which is featured in the game Skate 2, "No Name, No Words," "Looking in Your Eyes" and "Born to Be Cyco" which he shares credit with Rocky George and Mike Muir. From 1981 through 1988 his fellow band members included; Mike Muir (Vocals), Ralph J. (R.J.) Herrera (drums), Amery Smith (drums), Sal Troy (drums), Grant Estes (lead guitar), Jon Nelson (lead guitar) and Rocky George (lead guitar). At the end of 1988, Louiche was asked to leave Suicidal and told that "his playing had gotten worse" and that "he wasn't good anymore." Muir allegedly withheld Mayorga's part of the royalty payments. In an interview Louiche stated "It was around $100,000 dollars and I had to sue him (Mike Muir) to get my money back." When Mike Muir switched Suicidal's musical style from punk to metal, he was replaced by ex-No Mercy bassist Ric "Rancid" Clayton (the artist who designed the Suicidal Tendencies logo as well as the shirts on S.T.'s first album), but he was quickly replaced by Bob Heathcote.
 Passage 3:The nuclear fuel elements were made of refractory ceramic based on beryllium oxide, with enriched uranium dioxide as fuel and small amount of zirconium dioxide for structural stability. The fuel elements were hollow hexagonal tubes about long with distance between the outer parallel planes, with inside diameter of . They were manufactured by high-pressure extruding of the green compact, then sintering almost to its theoretical density. The core consisted of 465,000 individual elements stacked to form 27,000 airflow channels; the design with small unattached elements reduced problems related with thermal stresses. The elements were designed for average operation temperature of ; the autoignition temperature of the reactor base plates was only 150 °C higher. The neutron flux was calculated to be 9×10 neutrons/(cm·s) in the aft and 7×10 neutrons/(cm·s) in the nose. The gamma radiation level was fairly high due to the lack of shielding; radiation hardening for the guidance electronics had to be designed.

Output:
1