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: What is the volume of the lake that the Yellowstone River feed and drain? Passage 1:Donawa came through the youth setup at Somerset Trojans, playing in the Player Development League and the U-14 KO Cup. He made his senior debut for Somerset on 2 January 2014, appearing off the bench in the Friendship Trophy final as the Trojans claimed a 3–2 victory against Hamilton Parish. He continued to appear for Somerset for four more seasons, albeit infrequently as he could only play for the club while on breaks from school. Donawa returned to Somerset during the 2014–15 season, playing against Robin Hood in the Friendship Trophy and helping the club to claim their first Bermudian Premier Division title in 22 years. He was unable to appear in the title-deciding victory over Southampton Rangers, however, after suffering a sprained ankle while on international duty. Donawa helped the club to another championship in 2015–16, appearing in the Friendship Trophy while on holiday from school. He scored the final goal of a 3–0 victory against Hamilton Parish in the semifinals, giving Somerset the chance to win their eleventh Friendship Trophy after the new year. Against PHC Zebras in the final, Donawa scored the winning goal just before halftime as the Trojans claimed a 2–1 victory. On 12 December 2016, Donawa scored his first career Bermudian Premier League goal. His eighth-minute strike, off an assist from Hubert Buttersfield, helped Somerset claim a 2–2 draw against Devonshire Cougars. His second league goal had to wait until the 2017–18 season, coming in a 3–1 victory over X-Roads Warriors on 11 December 2017. He also added a goal in the semi-finals of the Expansion League Festive Tournament later that month and played the full 90 minutes in a 3–3 draw with North Village Rams on 17 March that clinched Premier Division safety for Somerset. The match against North Village would mark Donawa's final game with the club, as he was unable to participate during the 2018–19 season due to injury and a lack of international clearance.
 Passage 2:The river rises in northwestern Wyoming in the Absaroka Range, on the Continental Divide in southwestern Park County. The river starts where the North Fork and the South Fork of the Yellowstone River converge. The North Fork, the larger of the two forks, flows from Younts Peak. The South Fork flows from the southern slopes of Thorofare Mountain. The Yellowstone River flows northward through Yellowstone National Park, feeding and draining Yellowstone Lake, then dropping over the Upper and Lower Yellowstone Falls at the head of the Grand Canyon of the Yellowstone within the confines of the park. After passing through the Black Canyon of the Yellowstone downstream of the Grand Canyon, the river flows northward into Montana between the northern Absaroka Range and the Gallatin Range in Paradise Valley. The river emerges from the mountains near the town of Livingston, where it turns eastward and northeastward, flowing across the northern Great Plains past the city of Billings.
 Passage 3:A halfback, Marhefka spent four seasons, 1920 through 1924, on Lafayette's football team under coach Jock Sutherland. In 1921 the squad went undefeated, but the college's president refused to allow them to compete in the Rose Bowl. After graduation, he was picked up by the Pottsville Maroons and played with them during their sole season in the Anthracite League, in which they were the champions. He remained with the team when they joined the National Football League the following year and was with them when, despite having the best record in the league, they were denied the 1925 NFL championship after being controversially suspended. He had a final season in professional football with the 1926 Philadelphia Quakers of the first American Football League, in which they were the champions. Marhekfa appeared in two games for the team during the season.

Answer:
2