You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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.
.
Solution: 1
Why? The question refers to the 704th unit and task about war which is decribed by Passage 1.

New input: Question: What is the elevation of the city where John had a sawmilling business? Passage 1:In the spring of 1902, Bulgaria, an Ottoman vassal state which was interested in acquiring Macedonia, signed a military convention with Russia. Late in the fall, Russia, supported by the United Kingdom and France, proposed to the Ottomans political reforms for the Macedonian vilayets. On 8 December, the Ottoman sultan, Abdul Hamid II, signed a decree implementing most of the reforms. In February 1903, the new Russian foreign minister, Vladimir Lamsdorf, visited Vienna and signed the so-called "Vienna Program" on Macedonian reforms. The program was substantially the same as the Ottoman decree of December. The immediate provocation of a new agreement at Mürzsteg was the Ilinden–Preobrazhenie Uprising that broke out on 2 August. With its quick suppression, the Vienna Program lay dead. In September Tsar Nicholas II of Russia visited the Emperor Francis Joseph of Austria-Hungary at the latter's castle in Mürzsteg, Austria. The two rulers put their signatures to a new memorandum, substantially identical to the Vienna Program, which called for the appointment of one Russian and one Austro-Hungarian civil agent to oversee the reform of the administration, judiciary and local gendarmerie in the Macedonian vilayets. In all these institutions Christians were to take part. After Abdul Hamid accepted the proposal in November, Russia appointed one N. Demerik as its agent, and Austria chose one G. Müller. They began their work under Hüseyin Hilmi Pasha, the Inspector-General of Macedonia, in early 1904. Under the Mürzsteg program, each Great Power appointed an advisory official to the Ottoman official in charge of reforming the gendarmerie in each province. Austria-Hungary appointed an advisor to the sanjak of Üsküp, Russia to the sanjak of Thessaloniki, France to the sanjak of Siroz and Britain to the sanjak of Drama.
 Passage 2:Chanter was born in Panoomilloo near Rochester, Victoria and was the son of John Chanter and Mary Anne Clark. His father was a farmer and politician who represented the seats of Murray and Deniliquin in the Legislative Assembly between 1885 and 1901 as a Protectionist. He held ministerial office as the Secretary of Mines in the government of George Dibbs. John Chanter, sr. was also the member for Riverina in the Australian House of Representatives at various times between 1901 and 1922. He was a member of the Protectionist Party until 1909, the Australian Labor Party and, after the Labor Party split of 1916, the Nationalist Party. John Chanter Jr. was educated at the State Primary School Moama. He established a sawmilling business in Barham and a wheat farm in Tongala. In 1927 he moved permanently to New South Wales and became a prominent wheat farmer in Lake Cargelligo. Chanter was involved in local organizations in Tongala and Lake Cargellico including the show societies, Wheatgrowers Union and Freemasons. He was elected to the position of councillor for Deakin Shire in Victoria between 1919 and 1926 and was the shire president in 1925–26. He was also elected to Lachlan Shire Council in New South Wales between 1928 and 1945 and was the president in 1940-1.
 Passage 3:Finn's first commission was as project manager for the Rice Hotel, under contract with the firm of Mauran, Russell & Crowell. The owner of the new hotel, Jesse H. Jones, soon after established a collaboration with Finn which would change the face of Downtown Houston. Finn designed two buildings for Jones across the way from the Rice Hotel: the Foster Building, aka the Houston Chronicle Building, in 1914, and the Rusk Building in 1916. The corner of Texas and Travis was dominated by buildings built by Finn and Jones. In 1926, Finn designed a new seventeen-story wing for the Rice Hotel on behalf of Jones. Finn did architectural work for other commercial clients in the 1920s. He completed State National Bank Building (NHRP-listed) at 412 Main Street in 1923. Jones contracted with Finn to build the Lamar Hotel, where Jones established his new residence. The Jones apartment consumed the whole top floor, though he hired John F. Staub for the interior design. Jones also promised a venue for the 1928 Democratic National Convention without consulting the city of Houston, pledging $200,000 of his own capital. He engaged Finn and Kenneth Franzheim to design and erect the Sam Houston Hall in just four months. The Sam Houston Hall, ostensibly built to be a temporary structure, was larger than Madison Square Garden, and equipped with heavy-duty fans and apertures between the roof and the walls to facilitate air flow. Jones contracted with Finn on another project in downtown Houston, this time with in collaboration with Franzheim and J.E.R. Carpenter, to finish the 37-story, art deco Gulf Building in 1929 at that time the tallest building in Texas.

Solution:
2