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 many books did V. Gordon Childe write? Passage 1:Givens followed most of the Warner Bros. staffers to new studio DePatie–Freleng Enterprises, while also working with Jones once more on the Tom and Jerry cartoons produced by Jones at Sib Tower 12 Productions. He continued his Looney Tunes association by working at the Warner Bros.-Seven Arts cartoon studio in the late 1960s, remaining with that studio until it shut down. Further spells at DePatie–Freleng and Hanna-Barbera followed during the 1970s, before working at the reformed Warner Bros. Animation studio on Friz Freleng's Looney Looney Looney Bugs Bunny Movie (1981),  (1982) and Daffy Duck's Movie: Fantastic Island (1983). He then had spells at Filmation (whose founder, Lou Scheimer had actually worked under Givens when the two were freelancers in the 1950s) and Film Roman.
 Passage 2:Labor won the 1920 election with a majority of one and Storey became Premier. His thin majority, combined with a substantial minority in Legislative Council (made up of life appointees) and attacks of nephritis made his job hard. His private secretary at this time was V. Gordon Childe, later internationally famous in the field of archaeology, who wrote the book How Labor Governs, based on his experience as Storey's secretary. In June 1920, he appointed Judge Norman Ewing to carry out a royal commission in to the imprisonment of twelve IWW members in 1916 for treason, arson, sedition and forgery. On Ewing's recommendation, ten were released in August. In early 1921, he prorogued Parliament to prevent his Government being overthrown during a six months absence to visit financiers and a Harley Street doctor in London. Despite the warnings of his doctor, he undertook heavy work in London and on his return to Sydney in July.
 Passage 3:Cross was the third son born to English-born parents, Theophilus Edwin Cross, builder and architect, and his wife Florence, née Stanbrough, who met in Brisbane, married in Sydney then sought their fortune in the United States. His father hoped to make money there but only found work as a carpenter (he became secretary of the American Carpenters' Union). Cross was born on 3 December 1888 in Los Angeles, California. The family returned to Australia in 1892 when Stan was four years old and settled in Perth, Western Australia. Cross was a gifted student who attended Perth High School on a scholarship. The University of Adelaide offered him a scholarship but Cross turned it down due to his father's ill-health. He left school at sixteen and joined the State Government Railways Department as a clerical cadet. He studied art for a number of years during the evenings at Perth Technical School. In 1912 at the age of twenty four,he resigned from his job and with the financial assistance of his brother he travelled to London to study at Saint Martin's School of Art, during this time some of his cartoons were accepted by Punch. Before sailing for England he exhibited his paintings and pen-and-ink works twice in Perth, the first with the West Australian Society of Arts at their 1913 Annual Exhibition, and the second in March 1914, with another Perth artist, Michael McKinlay. On returning to Perth he contributed freelance drawings to the Western Mail and The Sunday Times, and whilst working as a railways draftsman in 1918, he was offered a job by Ernie Brewer of Smith's Weekly at £5 a week. Cross accepted the position and moved to Sydney in 1919.

Solution:
2