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.
Problem:Question: How many people graduate from the Air Command and Staff College in a year? Passage 1:Wiley was the Republican candidate for governor of Wisconsin in 1936, but his bid failed. Philip La Follette and the new Wisconsin Progressive Party, which split from the Republicans in 1934, won the election. In 1938, Wiley was elected to the U.S. Senate by defeating incumbent F. Ryan Duffy. In 1944, he was challenged by United States Marine Corps Captain Joseph R. McCarthy in the Republican primary. He defeated McCarthy and won the general election. Wiley, then an isolationist in foreign policy, and Governor Walter S. Goodland supported Republican presidential nominee Thomas E. Dewey in the 1944 race over incumbent Franklin D. Roosevelt, and Dewey won Wisconsin's electoral votes but fell far short nationally.
 Passage 2:Vandenberg graduated from the United States Military Academy in 1951 (where Buzz Aldrin was one of his classmates). In 1953, Vandenberg was assigned to the 86th Fighter-Bomber Wing. Later he would serve as a flight commander with the 413th Tactical Fighter Wing and the 31st Tactical Fighter Wing. He graduated from the Air Command and Staff College in 1961, after which he was assigned to the 4th Tactical Fighter Wing. In 1963, Vandenberg was appointed Operations Officer with the 23rd Tactical Fighter Squadron. During the Vietnam War, Vandenberg commanded the 390th Tactical Fighter Squadron. Upon returning stateside he was assigned to The Pentagon to work in the Office of the Director of Plans. He would graduate from the National War College in 1969 and return to The Pentagon to work with the Joint Chiefs of Staff. In 1971, Vandenberg became commander of the 12th Flying Training Wing. Vandenberg was named Vice Commandant of Cadets at the United States Air Force Academy in 1972. He would serve as Commandant from 1973 to 1975, during which time he assumed the rank of brigadier general. From 1976 to 1979, Vandenberg served at Headquarters U.S. Air Force, first as Deputy Director of Plans, later as Director of Operations and Readiness, and finally as Assistant Deputy Chief of Staff for Operations, Plans, and Readiness. Vandenberg was ultimately named Vice Commander in Chief of the Pacific Air Forces. His retirement was effective as of January 1, 1981.
 Passage 3:Gernát was drafted in the fifth round, 122nd overall, by the Edmonton Oilers in the 2011 NHL Entry Draft. After his draft selection, he would spend two seasons in the junior Western Hockey League with the Edmonton Oil Kings before signing a three-year entry level contract with the Oilers on April 20, 2013. He spent the next three seasons playing in the American Hockey League for the Oklahoma City Barons and the Bakersfield Condors before he was traded to the Anaheim Ducks on February 29, 2016 for Patrick Maroon. He would play just five games for the Ducks' AHL affiliate the San Diego Gulls before signing for HC Sparta Praha for the 2016-17 season. Gernát broke his contract with Sparta Praha in July 2017.

Solution:
2