You will be given a definition of a task first, then some input 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: Which of the planes that American used for their daily service from Los Angeles to Sydney, Auckland and Hong Kong is the largest? Passage 1:Clifford Eugene Charlesworth was born on November 29, 1931, in Red Wing, Minnesota, and grew up in Mississippi. He completed his education at Mississippi College with a bachelor's degree in physics in 1958. After a time as a civil servant with the United States Navy and the Pershing missile program of the United States Army, he joined NASA in 1962. He worked at the Manned Spacecraft Center in Houston, Texas, until 1970. He served as the Flight Director on Gemini 11 and Gemini 12, and as one of the Flight Directors on Apollo 8, the first mission to orbit the Moon; Apollo 11, the first mission to land on the Moon; and Apollo 12, the second Moon landing mission. From 1970 to 1972 he was manager of the Earth observation satellite program. He then worked as Deputy Head of the Payload Section of the Space Shuttle program, as Deputy Director of the Johnson Space Center, and as Director of Space Operations before he retired in 1988.
 Passage 2:American expanded its service to Asia and the Pacific. It was one of the initial US bidders in February 2010 to serve Tokyo's Haneda Airport, and was awarded rights to serve Haneda from New York JFK. American planned to begin JFK-Haneda service in January 2011, but postponed the service until February 2011 citing low booking demand, ultimately terminating its JFK-Narita service in favor of JFK-Haneda service in June 2012. American later cancelled its JFK-Haneda service in October 2013 due to the service being "quite unprofitable" due to the time constraints at Haneda Airport. American also began service between Los Angeles and Shanghai in 2011 and between Dallas/Fort Worth and Seoul in 2013, and from Dallas/Fort Worth International Airport to both Shanghai and Hong Kong in the summer of 2014, providing the first ever nonstop service between Dallas/Fort Worth and China. In October 2014, American filed a report to the DOT to launch flights from Los Angeles to Tokyo-Haneda in place of Delta's Seattle-Tacoma operating slot, sparking a war that lasted for over eight months. American was originally granted the slot as a back-up to Delta's Seattle-Haneda route if it failed to operate on a daily basis on March 28, 2015 (which would give the operating rights to American), but in June 2015, Delta announced the cancellation of its Seattle-Haneda service, claiming the daily operation was not feasible due to the route not being an economically viable one in the Seattle market due to certain regulatory and market conditions. American launched daily service from Los Angeles to Tokyo-Haneda on February 11, 2016 using their Boeing 787 aircraft. American also added daily service from Los Angeles to Sydney, Auckland and Hong Kong on their flagship Boeing 777-300ER (to Sydney and Hong Kong) and Boeing 787-8 (to Auckland) respectively (the flights to Auckland and Sydney was replaced by Boeing 787-9 aircraft in Fall 2017), returning to Australia and New Zealand for the first time since the 1990s and providing the first ever non-stop service between the Continental U.S. and Australia and New Zealand on American Airlines. American added service from Los Angeles to Beijing on November 5, 2017, and has plans for more expansion in the Asia-Pacific region in the coming years. As of November 2017, American Airlines offers service to eight destinations in Asia and Oceania from its hubs in Los Angeles, Chicago and Dallas-Fort Worth, offering a total of fifteen routes.
 Passage 3:Merivale was the second son of John Herman Merivale (1770–1844) and Louisa Heath Drury, daughter of Joseph Drury, headmaster of Harrow. He was educated at Harrow School under George Butler from 1818 to 1824, where his chief schoolfriends were Charles Wordsworth and Richard Chenevix Trench. He took part in the Eton versus Harrow cricket match in 1824. In 1824 he was offered a post in the Indian civil service, and went for a short time to Haileybury College, where he did well in Oriental languages. Deciding against an Indian career, he went up to St John's College, Cambridge in 1826. Among other distinctions he came out as fourth classic in 1830, and in 1833 was elected fellow of St John's. He was a member of the Apostles' Club, his fellow-members including Tennyson, A. H. Hallam, Monckton Milnes, W. H. Thompson, Trench and James Spedding. Merivale was the main protagonist on the Cambridge side in instigating the Oxford and Cambridge Boat Race held at Henley on Thames in 1829. He rowed at number four in the Cambridge boat in the race which Oxford won.

Output:
2