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: How many copies did the single that featured a duet with Monica sell? Passage 1:After the release of Levitate, his first full-length album, in 2011, he began to play shows and festivals around the country. Starting in 2012 with a US tour that saw him hit the road with The M Machine, he continued on to play the Coachella Valley Music and Arts Festival, more commonly known as Coachella, a festival that takes place in April in Indio, California. After Coachella he played Electric Forest Festival in Rothbury, Michigan in June 2012. He then played Lollapalooza Music Festival in Chicago, Illinois Grant Park (Chicago) in early August 2012 before Heading to New York City to play Electric Zoo Festival at the end of August 2012 on Randall's Island. He then kicked off his very own solo Night Vision Tour 2012 in September by releasing a 30-minute mix entitled Night Vision Tour Mix 2012. He has also played at Bonnaroo Music Festival in June 2013 in Manchester, Tennessee.
 Passage 2:In June 1998, Norwood released her second album Never Say Never. Boosted by the success of its number-one lead single "The Boy Is Mine", a duet with singer Monica, it facilitated Norwood in becoming a viable recording artist with media–crossing appeal. In total, the album sold 16 million copies worldwide and spawned seven singles, including Norwood's second number-one song, the Diane Warren-penned "Have You Ever?". Also in 1998, Norwood made her big screen debut in a supporting role in the slasher sequel, I Still Know What You Did Last Summer, which garnered her both a Blockbuster Entertainment Award and an MTV Movie Award nomination for Best Breakthrough Female Performance. The following year, she co-starred with Diana Ross in the telefilm drama Double Platinum about an intense, strained relationship between a mother and daughter. Both Norwood and Ross served as executive producers of the movie which features original songs from Never Say Never and Ross's Every Day Is a New Day (1999).
 Passage 3:Richardson was born at Quarndon, Derbyshire. He was educated at Winchester College and in a match against Harrow School scored 117 for the Winchester XI in a partnership of 295. At the start of the 1928 season he made his debut for Derbyshire against the West Indies. In his first three seasons he managed a highest score of 70 and his best seasonal average was 25. He became Derbyshire captain in the 1931 season and led his team to 7th in the points table. In the 1932 season he scored 1,258 runs with an average of 29.95 and made his highest score of 90 against Nottinghamshire, although the team fell back to 10th in the Championship. He led the team progressively up to sixth in the 1933 season, third in the 1934 season, and second in the 1935 season with 16 wins. In the 1936 season the club won the County Championship winning 13 matches. He was supported by batsmen Stan Worthington, Leslie Townsend, Denis Smith and Albert Alderman each of whom scored over a thousand runs and several centuries. Bill Copson, Tommy Mitchell, Alf Pope and Leslie Townsend accounted for most of the wickets taken. Richardson finished his cricket career at the end of the 1936 season. Wisden stated that he achieved much by his own enthusiasm and warm personality.

Answer:
2