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: What is the population of the country where Mello was the head of a Portuguese delegation to the World Leprosy Conference? Passage 1:`Abdu'l-Bahá had mentioned an intention of visiting Montreal as early as February 1912 and in August a phone number was listed for inquirers to arrange appointments for his visit there. He left to Boston and then rode to Montreal where he arrived near midnight on 30 August 1912 at the Windsor train station on Peel Street and was greeted by William Sutherland Maxwell. He would stay in Montreal until 9 September. On his first day in the city he was visited by Frederick Robertson Griffin who would later lead the First Unitarian Church of Philadelphia. Later that morning he visited a friend of the Maxwell's who had a sick baby. In the afternoon he took a car ride around Montreal. That evening a reception was held including a local socialist leader. The next day he spoke at a Unitarian church on Sherbrooke Street. Anne Savage recorded that she had sought him out but uncharacteristically was shy upon seeing him. He took up residence in the Windsor Hotel. The next day William Peterson, then Principal of McGill University visited him. After a day of meeting individuals he took an afternoon excursion on his own possibly to the francophone part of the city and back. That evening he spoke to a socialist meeting addressing "The Economic Happiness of the Human Race" — that we are as one family and should care for each other, not to have absolute equality but to have a firm minimum even for the poorest, to note foremost the position of the farmer, and a progressive tax system. The next day he rode the Mountain Elevator of Montreal The next day Paul Bruchési Archbishop of the Roman Catholic Archdiocese of Montreal visited him and later he spoke at the Saint James United Church; his talk outlined a comprehensive review of the Bahá'í teachings. Afterwards he said:I find these two great American nations highly capable and advanced in all that appertains to progress and civilization. These governments are fair and equitable. The motives and purposes of these people are lofty and inspiring. Therefore, it is my hope that these revered nations may become prominent factors in the establishment of international peace and the oneness of the world of humanity; that they may lay the foundations of equality and spiritual brotherhood among mankind; that they may manifest the highest virtues of the human world, revere the divine lights of the Prophets of God and establish the reality of unity so necessary today in the affairs of nations. I pray that the nations of the East and West shall become one flock under the care and guidance of the divine Shepherd. Verily, this is the bestowal of God and the greatest honor of man. This is the glory of humanity. This is the good pleasure of God. I ask God for this with a contrite heart.
 Passage 2:Price made his first-class debut for Glamorgan against Gloucestershire in the 1984 County Championship. He made sixteen further first-class appearances for the Welsh county, the last of which came against Sussex in the 1985 County Championship. In his seventeen first-class matches, he took 19 wickets at an average of 42.42, with best figures of 4/97. With the bat, he scored 144 runs at an average of 16.00, with a high score of 36. He made his List A debut for the county against Derbyshire in the 1985 John Player Special League. He made ten further List A appearances for Glamorgan during the 1985 season, the last of which came against Sussex. In his eleven List A appearances, he took 5 wickets at an average of 38.00, with best figures of 3/22. With the bat, he scored 59runs at an average of 9.83, with a high score of 22. He left Glamorgan at the end of that season.
 Passage 3:During the same period, he also served as Chief of Public Health for Portuguese India. He undertook a postgraduate course in parasitology in Kaiser Willhelm Institute fuer Biologie, Berlin, and at the Max Planck Institute, Potsdam, Germany from 1922–23. In 1922, at the age of 35, Mello became a Colonel in the Portuguese Army Medical Corps, achieving the highest rank in the medical military hierarchy of that time, exclusively through merits in the medical campaigns on Public Health which he carried out in Goa, Daman, Diu, and in Angola. Mello was the head of a Portuguese delegation to the World Leprosy Conference in Cuba and is known to have attended at least 40 World Conferences, including the All India Sanitary Conference in Lucknow (1914) and the Third Entomological Meeting in Lucknow (1914) where, at the invitation of the Governor-General of India, he lectured on medical mycology. His researches in tropical medicine brought him international fame and recognition as a world-renowned expert on the subject. Mello published more than 200 research papers on bacteriology in Portuguese, French and English journals. He founded the following medical journals in Goa, Boletim Geral de Medicina, Arquivos Indo-Portugueses de Medicina e Historia Natural, and Arquivos da Escola Medico–Cirurgica de Nova Goa. His work in French entitled, A la veille du Centenaire (On the eve of the Centenary) elaborated in great detail the contributions of Goa Medical College during the first hundred years of its establishment. Separate from his medical career, Mello also authored a book in 1946 on the Bengali poet, Rabindranath Tagore entitled O Cantico da Vida na Poesia Tagoreana (The song of life in the poetry of Tagore).

Answer:
3