Given the task definition and input, reply with output. 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: How many cylinders was the Skytrain's engine? Passage 1:The Dufek Coast is that portion of the coast along the southwest margin of the Ross Ice Shelf between Airdrop Peak on the east side of the Beardmore Glacier and Morris Peak on the east side of Liv Glacier. It was named by the New Zealand Antarctic Place-Names Committee in 1961 after Rear Admiral George J. Dufek, United States Navy, who served under Rear Admiral Richard E. Byrd with the United States Antarctic Service, 1939–41, and as commander of the Eastern Task Force of U.S. Navy Operation Highjump, 1946–47. He was Commander of U.S. Naval Support Force Antarctica, 1954–59, a period in which the following American science stations were established: McMurdo Station, Little America V, Byrd Station, South Pole Station, Wilkes Station, Hallett Station and Ellsworth Station. United States Navy ships, aircraft, and personnel under his command provided broad logistical support to research and survey operations, including aerial photographic missions to virtually all sectors of Antarctica. On October 31, 1956, Dufek in the ski-equipped R4D Skytrain aircraft Que Sera Sera (pilot Lieutenant Commander Conrad Shinn), flew from McMurdo Sound via Beardmore Glacier to make the first airplane landing at the South Pole.
 Passage 2:The Royals began operations with General Manager Cedric Tallis, who soon developed a reputation as the best trader in the league. The first big trade was with fellow expansion team Seattle, which brought in 1969 Rookie of the Year Lou Piniella. In their inaugural game, on April 8, 1969, the Royals defeated the Minnesota Twins 4-3 in 12 innings. Two pitching stars from the Baltimore Orioles team that won the 1966 World Series pitched for the Royals in the inaugural game: Wally Bunker threw the franchise's very first pitch, and Moe Drabowsky won the game in relief. After finishing the season in 5th place, the Royals' next trade cemented a reputation as a speedy team. Third baseman Joe Foy was traded to the New York Mets for speedy outfielder Amos Otis, who would become the Royals' first star. Further one-sided trades brought to the Royals second baseman Cookie Rojas, bullpen ace Ted Abernathy, shortstop Fred Patek, first baseman John Mayberry and left fielder Hal McRae. The Royals also invested in a strong farm system and in the early years developed such future stars as pitchers Paul Splittorff and Steve Busby, infielders George Brett and Frank White, and outfielder Al Cowens.
 Passage 3:Rimington was born Stella Whitehouse in South London, England; her family moved from South Norwood to Essex in 1939, due to the danger of living in London during World War II. Her father got a job as chief draughtsman at a steel works in Barrow-in-Furness in Cumbria, and the family moved there and she was educated at Crosslands Convent School after spending some time in Wallasey. When her father got a job in Ilkeston, Derbyshire, the family moved to the Midlands, where Stella attended Nottingham High School for Girls. She spent her last summer of secondary school working as an au pair in Paris, before enrolling at the University of Edinburgh in 1954 to study English. By chance, she met her future husband, John Rimington, whom she had known from Nottingham.
1