Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following 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: 1
Reason: The question refers to the 704th unit and task about war which is decribed by Passage 1.

Now, solve this instance: Question: What units did the Colonel Warrington served under inn the Texas-Indian Wars command? Passage 1:Lewis Warrington III, the grandson of War of 1812 naval hero Commodore Lewis Warrington, was born in Washington, D.C. and later entered the United States Army there. He was assigned to the 4th U.S. Cavalry Regiment as a second lieutenant on June 18, 1867, and then made a first lieutenant on July 31, 1869. Warrington spent most of his career on the Texas frontier and served under Colonel Ranald S. Mackenzie during the Texas-Indian Wars of the 1870s. On December 8, 1874, he and ten cavalrymen pursued a group of hostile Comanche Indians through the Muchague Valley. Both groups were riding at a full gallop and several riders of Warrington's unit were left behind. Warrington personally captured one Indian, turning him over to a trooper whose horse could not continue, and resumed the pursuit with Privates Frederick Bergendahl and John O'Sullivan. After five miles, their horses exhausted, the Comanches dismounted and decided to shoot it out with the troopers. Climbing out of the valley onto the plain, they opened fire on Warrington and his men as they climbed up after them. Warrington eventually became separated from the others and found himself at the mercy of five Comanche warriors. He was forced to fight them off single-handed and, after exhausting his ammunition, used his rifle as a club in hand-to-hand combat. Bergendahl and O'Sullivan found themselves in a similar situation and killed all but one of their attackers. O'Sullivan pursued the lone survivor but was unable to catch him. All three men received the Medal of Honor four months later, Warrington being the only officer of the Indian Wars to receive the award following the battle rather than years afterwards like other officers. Warrington died on January 5, 1879, and was buried in San Antonio National Cemetery.
 Passage 2:Johanna Hellman was born in Nuremberg, German Empire on 14 June 1889. In 1912 she attended medical school at the University of Berlin where she was trained under the German physician . Hellman later returned to medical school at the University of Kiel, where she received specialized training to become a surgeon. After the start of World War I that year, she worked in the University of Kiel Hospital, completing her final licensing exam and wrote her doctoral thesis. She remained in Kiel during the war and assisted with the care of injured soldiers. In 1912, she joined the Northwest German Surgical Society and began filling in for surgeons at various municipal hospitals. Hellman became the first female member of the German Society for Surgery in 1925. From 1929 to 1938 she worked as a surgeon, radiologist, and urologist at the Charité clinic in Berlin. At this time, she became assistant to Ferdinand Sauerbruch, the head of surgery at the university clinic. Hellman also became director of a Salvation Army hospital during this time period, introducing a surgical division to the maternity ward of a Salvation Army hospital. She was forced to resign from her roles as head doctor in 1938 due to Nazi discrimination laws. Hellman emigrated to Stockholm, Sweden, but could not work as a surgeon because of her refugee status. She was able to work as a nanny and spent her time learning Swedish. In 1944, she became an assistant in the Surgical Hospital of Eskilstuna and was authorized to form a private practice three years later. In 1947, Hellman managed her private practice at the Red Cross Hospital, working as an abdominal surgeon. Hellman and conducted research and published papers regarding radiation as a treatment of breast cancer. On or around this time in Hellman's life, it has been documented that she was in correspondence with Lisa Meitner as well. She was still working at age 86, but little is known of her subsequent life. Hellman died in 1982 in Stockholm.
 Passage 3:"Dirty Dancer" was written by Enrique Iglesias, RedOne, Evan Bogart, Erika Nuri and David Quiñones, and was produced by RedOne. It was recorded at South Point Studios, Miami. "Dirty Dancer" is a dance-pop song with some influences of electropop, dubstep, and rave music. According to Adam Graham of MTV News, "Dirty Dancer" is about "a comely-yet-dangerous female"; its hook features the lyrics "She's a dirty, dirty dancer/ Dirty, dirty dancer/ Never ever lonely". At the beginning on the song, Usher dedicates it to "the dirty girls all around the world". Iglesias and Usher exchange verses before, on the single remix, Wayne gives his rap verse, which makes a reference to actor Eddie Murphy. "Dirty Dancer" was included on Iglesias' sixth studio album, Euphoria, and Usher's EP Versus. "Dirty Dancer" was sent to Australian contemporary hit radio (CHR) and nights radio on 9 May, while the single remix was sent to US CHR 10 May. The single was released as a music download in North America on 12 June 2011, and was released in Europe and Oceania on 19 June.

Student:
1