Detailed Instructions: 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.
Q: Question: What does UNESCO stand for? Passage 1:Wyndham devoted much of his life to public service outside of his role in the Department of Education. In 1945 he led the Australian delegation at the conference which created UNESCO and was a member of the Australian delegation to UNESCO in 1958 and again in 1966. In 1959 he represented Australia at the Commonwealth Education Conference at Oxford and again in New Delhi in 1962. He was a Fellow of the Royal Institute of Public Administration and a Fellow and President (1963–1965) of the Australian College of Educators. He was Chairman of the NSW State Library Board, NSW State Archives Authority, Secondary Schools Board, Board of Senior School Studies, Board of Teacher Education, Sydney Symphony Orchestra Advisory Committee and Intellectually Handicapped Standing Committee amongst others. He was a member of the Senate of the University of Sydney, Council of the University of New South Wales, Council of the University of New England, Council of Macquarie University, Technical Education Advisory Council and the Sydney Opera House Trust. In 1961 Wyndham was appointed a Commander of the Order of the British Empire for services to education in NSW and in 1969 appointed a Knight Bachelor.
 Passage 2:He was a high school yokozuna at Saitama Sakae High School (also the alma mater of Gōeidō) and won multiple major amateur champions before his senior year at Nippon Sport Science University. If he had entered professional sumo in either of those years he would have started as a makushita tsukedashi and skipped the lower divisions, but his parents wanted him to complete his education. So instead he made his debut in March 2015 at the maezumō level. He was unable to compete under his family name of Nakamura as that was already taken by Nakamura Oyakata (former sekiwake Kotonishiki), so instead he used his given name, Daiki. He rose up the ranks quickly, winning the yūshō or tournament championships in the jonidan and sandanme divisions with perfect 7-0 records. He became a sekitori upon reaching the jūryō division in July 2016, and he won the jūryō championship in September with a 12–3 record, which saw him promoted to the top makuuchi division. His rise to the top division in ten tournaments was the second fastest of modern times behind that of Jōkōryū who achieved the feat in nine tournaments in 2012. At this point he changed his shikona from Daiki to Hokutofuji, which was derived from the shikona of his stablemaster, former yokozuna Hokutoumi, and Hokutoumi's own stablemaster, former yokozuna Kitanofuji.
 Passage 3:William Lewis was educated at the University of Colorado, Texas Christian University and New York University. He began his career as a writer and an athlete before deciding to pursue a career in opera. He began his voice training under Karl Kritz and Arthur Faguy Coté in Fort Worth, followed by studies with Susan Seton and Hulda and Luigi Rossini in New York. He made his professional opera debut in 1953 with Fort Worth Opera as Rinuccio in Puccini's Gianni Schicchi. Two years later he won the Metropolitan Opera's Audition of the Air competition (precursor to the National Council Auditions). Lewis made his debut at the Metropolitan Opera as Narraboth in Salome on March 1, 1958 and subsequently sang in 234 performances in his 35 years with the company. In 1975 he made his debut at San Francisco Opera as Steuermann and Erik in The Flying Dutchman and has sung in sixteen different productions with the company in subsequent seasons. In 1981 he made his debut at the Salzburg Festival in the title role of Offenbach's The Tales of Hoffmann, returning there for the following four years in such roles as Arbace in Idomeneo and the First Geharnischter in The Magic Flute. In 1990 he made his debut at the Teatro Lirico in the world premiere of Azio Corghi's Blimunda.

A:
1