Definition: 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.
Input: Question: Did the professor Chamberlain studied under author any books? Passage 1:Chamberlain then went to Geneva, where he studied under Carl Vogt (a supporter of racial typology at the University of Geneva), Graebe, Müller Argoviensis, Thury, Plantamour, and other professors. He studied systematic botany, geology, astronomy, and later the anatomy and physiology of the human body. Under the tutelage of Professor Julius von Wiesner of the University of Vienna, Chamberlain studied botany in Geneva, earning a Bacheliers en sciences (BSc) physiques et naturelles in 1881. His thesis, Recherches sur la sève ascendante (Studies on rising sap), was not finished until 1897 and did not culminate in a further qualification. The main thrust of Chamberlain's dissertation is that the vertical transport of fluids in vascular plants via xylem cannot be explained by the fluid mechanical theories of the time, but only by the existence of a "vital force" (force vitale) that is beyond the pale of physical measurement. He summarises his thesis in the Introduction: Physical arguments, in particular transpirational pull and root pressure, have since been shown to be adequate for explaining the ascent of sap.
 Passage 2:Born at Devon, Jamaica, where he was taught cricket by the manager of a banana plantation and once played in a match featuring George Headley. Gibson moved to England in 1944, accompanied by a friend, where he joined the Royal Air Force and saw service in the later stages of World War II while stationed near Melton Mowbray in Leicestershire. Following the war, Leicestershire County Cricket Club secretary Cecil Wood was given the task of building a team for the resumption of first-class cricket, with Gibson impressing Wood in friendly one-day matches against Northamptonshire and Nottinghamshire in 1945. He was offered the chance to play for Leicestershire in 1946, making two first-class appearances against Yorkshire in the County Championship at Headingley and Oxford University at the University Parks. He scored a total of 17 runs in his two matches, at an average of 5.66, with a high score of 11. He suffered arm and head injuries in a car accident midway through the 1946 season and was not reengaged by the county.
 Passage 3:The Lakers were founded as the Detroit Gems in 1946 before relocating to Minneapolis, Minnesota and renaming themselves the Lakers (Minnesota's nickname is "The Land of 10,000 Lakes"). The club won several titles led by center George Mikan in the 1950s before moving to Los Angeles in 1960. In 1972 they won another championship led by center Wilt Chamberlain and point guard Jerry West. After acquiring center Kareem Abdul-Jabbar in 1975 and point guard Magic Johnson in 1979, the Lakers built a team that won 5 titles in the 1980s. With the retirement of Johnson and Abdul-Jabbar, they struggled in the 1990s. However, in 1996 the club acquired free agent center Shaquille O'Neal and traded with the Charlotte Hornets for newly drafted shooting guard Kobe Bryant. With the two maturing under coach Phil Jackson, the club turned into a contender in the early 2000s.

Output:
1