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: How old was Alan when his brother Stan was born? Passage 1:The Shiromani Akali Dal held a protest over the SYL issue on 12 April 2016 in Ludhiana, whilst accusing national convenor of Aam Aadmi Party and Chief Minister of Delhi Arvind Kejriwal and his government of "double-speak" and "anti-Punjab stand". On 11 November 2016, all Indian National Congress MLAs of the Punjab Legislative Assembly resigned in protest at the Supreme Court's decision that the state's termination of the link canal was unconstitutional. Aam Aadmi Party began an indefinite protest on the same day at Kapoori village, blaming both the Shiromani Akali Dal and Congress for SYL. Apprehending law and order problem over the issue, the Punjab Police deployed the Rapid Action Force in parts of Punjab, sealed the border with Haryana and increased patrolling on the National Highway-1 on 12 November. A Congress rally was organised on 13 November at Khuian Sarwar village. President of Punjab Pradesh Congress Committee Amarinder Singh declared that not a single drop a water will go out of Punjab while also announcing that a Congress delegation including MPs and MLAs would meet President of India Pranab Mukherjee on the issue. The delegation met the President on 17 November, urging him to form a panel to look into the SYL issue and direct the Union government to consider ground realities and water availability in the state before taking any action on advice of the Supreme Court. Amarinder resigned from Lok Sabha on 23 November in protest against the issue. A delegation of Punjab government's ministers met the President on 28 November, urging him not to accept any advice against the riparian water rights. The Akali Dal held a rally at Moga on 8 December regarding the issue. Chief Minister Prakash Singh Badal stated that the controversy had been resolved after hiving back the land meant for the canal to the original owners. He also stated that Punjab didn't have a single drop of water to spare.
 Passage 2:In 1479, the Lord of Béarn, Francis Phoebus, inherited the Kingdom of Navarre, across the Pyrenees to the southwest. The two sovereign principalities remained in personal union until their extinction. Béarn went on to be ruled by Henry II of Navarre, who inherited it from his mother. In 1512, the Kingdom of Navarre was almost entirely occupied by Spain; only Lower Navarre, north of the Pyrenees escaped Spanish permanent occupation. The Bearnese monarchs extended the use of Occitan to Navarre after 1512, despite the fact that it was not the vernacular there, where Basque was the tongue of the people. The Estates of Navarre convoked in 1522 (or in 1523, according to other sources) kept records in Occitan, as did the Chancery of Navarre created in 1524. When Henry II revised the Fueros of Navarre in 1530, he had them translated from Castilian into Occitan.
 Passage 3:Brown was born in 1937 in Lewes, Sussex, one of six brothers who all played football; two, Irvin and Stan, also played in the Football League. He played local football for Lewes St Mary's and Portslade before being called up for National Service. A tall, heavily built man, Brown was serving in Gibraltar in March 1958 when he was recommended to Brighton & Hove Albion as a promising centre half; he signed for the club six months later, the day after his brother Irvin, also a centre half, left it. He made his first-team debut three years later, by which time he had converted to play at centre forward, and made eight appearances, scoring twice, in the first half of the 1961–62 Second Division season. In January 1962, he joined Exeter City, managed by former Brighton team-mate Glen Wilson. He scored three goals from eleven Division Four appearances, and left at the end of the season for non-league football with clubs including Hastings United and Dover. After football, Brown worked as a landscape gardener. He died in Lewes in 2016 at the age of 78.

Solution:
3