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-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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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: Is the race that Kling won in 1952 while driving a Mercedes-Benz 300SL still held? Passage 1:Rose was born in London, the son of a Jewish father and a mother who had converted to Judaism. He began making super 8 films when he was 9. By 1975, he won an amateur film competition hosted by BBC which led to the broadcasting of his works. He worked for Jim Henson on the last season of The Muppet Show and then again on The Dark Crystal in 1981. He attended National Film and Television School and graduated in 1982 with a Master's in Filmmaking. After this, he moved on to directing music videos for MTV, one of which was the uncensored version of Frankie Goes To Hollywood's hit "Relax".
 Passage 2:Ardley was born in Epsom, Surrey. Signed by Wimbledon as a youngster, whilst at Carshalton Boys Sports College, he made his way through the youth set up until breaking into the first team. Ardley made eight league appearances for Wimbledon in the 1991–92 season, featuring more prominently in the 1992–93 campaign, in which he played in 26 games and scored four goals in the inaugural season of the FA Premier League as the Dons finished 12th. Wimbledon finished 6th in the FA Premier League in 1993–94, matching the record highest ranking achieved by the club during their first ever season in the top flight during 1986–87. Ardley's contribution was more limited during this season, however, as he was selected to play in just 16 games. He scored just once in a 2–1 win over Sheffield Wednesday on 15 January 1994. He was in and out of the side for nearly a decade afterwards, remaining with the Dons after their relegation at the end of 1999–2000. Two more seasons followed as he unsuccessfully tried to help them regain their Premier League place, before he signed for Division One rivals Watford on a free transfer on 9 August 2002.
 Passage 3:Kling was instrumental in developing Mercedes' return to international competition in the early 1950s, and his win in the 1952 Carrera Panamericana road race, driving the then-experimental Mercedes-Benz 300SL was a defining point in assuring the Daimler-Benz management that motorsport had a place in Mercedes' future. Called up to the revived Mercedes Grand Prix squad in 1954 he finished less than one second behind the legendary Juan Manuel Fangio on his Formula One debut, taking second place in the 1954 French Grand Prix at the fast Reims-Gueux circuit. This promising start was not to last, and with the arrival of Stirling Moss at Mercedes in 1955 Kling was effectively demoted to third driver. However, away from the World Championship, Kling took impressive victories in both the Berlin Grand Prix (at AVUS, another high-speed circuit) and the Swedish Grand Prix. He left the Formula One team at the end of the season, to succeed Alfred Neubauer as head of Mercedes motorsport. He was in this post during their successful rallying campaigns of the 1960s, occasionally taking the wheel himself. On one such occasion he drove a Mercedes-Benz 220SE to victory in the mighty 1961 Algiers-Cape Town trans-African rally.

Answer:
3