Given the task definition, example input & output, solve the new input case.
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.
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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Output: 1
The question refers to the 704th unit and task about war which is decribed by Passage 1.

New input case for you: Question: What year was Richard Burt's grandfather born? Passage 1:In April 1603, Martin Pring used the Haven as his departure point for his exploratory voyage to Virginia. The land comprising the site of Milford, the Manor of Hubberston and Pill, was acquired by the Barlow family following the dissolution of the monasteries in the mid-16th century. It acquired an additional strategic importance in the 17th century as a Royalist military base. Charles I ordered a fort to be built at Pill by Royalist forces and completed in 1643 to prevent Parliamentarian forces from landing at Pembroke Castle and to protect Royalist forces landing from Ireland. On 23 February 1644, a Parliamentarian force led by Rowland Laugharne crossed the Haven and landed at Pill. The fort was gunned from both land and water, and a garrison was placed in Steynton church to prevent a Royalist attack from the garrison at Haverfordwest. The fort was eventually surrendered, and quickly taken, along with St Thomas a Becket chapel. Just five years later in 1649 Milford Haven was again the site of Parliamentarian interest when it was chosen as the disembarkation site for Oliver Cromwell's Invasion of Ireland. Cromwell arrived in the Haven on 4 August, meeting George Monck, before Cromwell and over a hundred crafts left for Dublin on 15 August.
 Passage 2:Burt was born in Perth to Gladys (née MacMurtrie) and Frederick Julius Augustus Burt. His grandfather was Septimus Burt, who was also a member of parliament and served as Attorney-General of Western Australia. Burt attended Guildford Grammar School, and after leaving school went to the North-West, working variously as a crayfisherman, stationhand, pearler, and tin miner. He opened a machinery and hardware store in Cue in 1935, and in 1939 was elected to the Cue Road Board, of which he eventually became chairman. Burt entered parliament at the 1959 state election, narrowly winning the seat of Murchison from Everard O'Brien of the Labor Party. He transferred to the new seat of Murchison-Eyre at the 1968 election, and retired from parliament at the 1971 election. After leaving politics, Burt held directorships with various mining companies. He died in Perth in November 1993, aged 84, and had married Mary Groom in 1937, with whom he had three sons.
 Passage 3:Bucks County, an area sympathetic to the Doan Outlaws with a large loyalist population, grew out of William Penn's "holy experiment", and was guided more by Quaker "inner light" than by the traditional "rights of Englishmen". As a result of Penn's effort to create a "nation of nations," almost half of colonial Pennsylvania was non-English. In nearby Philadelphia, the elite Proper Philadelphians were rich, charming, tolerant, but had relinquished the role of governing the city. Philadelphia, by common agreement, was the largest, most cosmopolitan but also the most poorly governed city in the Colonies. Bucks County, when compared to Massachusetts in support for a war with England, was still "The Peaceable Kingdom". No doubt Pennsylvanians were outraged by the actions of the Crown, but they were more likely to express their discontent through resolutions than violent protests. Many Pennsylvanians remained skeptical about cutting ties with England right up to the signing of the Declaration of Independence. To illustrate this, the fighting in "Penn's Woods" started seven years after the Boston Massacre. As for the non-English Pennsylvanian, King George III, even at his worst, was better than what they had known in their homeland. Fat Pennsylvania's legendary prosperity helped ease discord. Bucks County could boast rich farmland, a canal to the sheltered port of Philadelphia, large supplies of fresh water, timber, iron, fire clay, game, and their famous fieldstone for building. The common New Englander by contrast had to choose between hard-scrabble farming or dangerous fishing off rock-ribbed coasts.

Output:
2