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: What classes did Hans Hermes teach at the University of Munster? Passage 1:Construction of the nuclear submarine Ekaterinburg (K-84) began at the Northern Machinebuilding Enterprise (Sevmash) in Severodvinsk on 17 February 1982, before being commissioned into the Soviet Navy on 30 December 1985. She was the second of the seven-boat Project 667BDRM Delfin class, which was developed at the Rubin Design Bureau in September 1975. A ballistic missile submarine, she was designed primarily to carry up to 16 R-29RM Shtil (NATO designation: SS-N-23 Skiff) SLBM for use against military and industrial facilities in the case of a nuclear war. Each Shtil missile carries ten 100 kt multiple independently targeted reentry vehicles, and has a circular error probable of . She is also equipped with RPK-7 Veter (NATO designation: SS-N-16 Stallion) anti-ship missiles for use against large surface vessels, and self-defense torpedoes.
 Passage 2:From 1931, Hermes studied mathematics, physics, chemistry, biology and philosophy at the University of Freiburg. In 1937 he passed the state examination in Münster and was attending there in 1938 when the physicist Adolf Kratzer was present. After that he went on a scholarship to the University of Göttingen and then became an assistant at the University of Bonn. During World War II he was a soldier on the Channel Island of Jersey until 1943 and then on to the Chemical Physics Institute of the Navy in Kiel. At the end of the war he moved to Toplitzsee, where he was tasked with working on new encryption methods. In 1947, he became a lecturer at the University of Bonn where he took his habilitation, his thesis called Analytical manifolds in Riemannian areas. In 1949 he became a Professor at the University of Münster, where he turned back to the subject of mathematical logic.
 Passage 3:Walter Rowley's "Trotters" finished in 17th place in 1947–48, 14th place in 1948–49, and 16th place in 1949–50. He scored six goals in 93 league games during his spell at Burnden Park. McShane joined Manchester United in exchange for defender John Ball and £5,000 in September 1950. He was signed to replace the departing Charlie Mitten. He scored seven goals in 31 appearances in the 1950–51 season, as the "Red Devils" finished second in the league. His first goal at Old Trafford came on 7 October 1950, in a 3–1 win over Sheffield Wednesday. He was part of the United side that won the First Division title in 1951–52, scoring one goal in 12 league games that season. His goal was an important one, as it came against rivals Manchester City in a 2–1 win at Maine Road on 15 September. He then struggled with a cartilage injury, and appeared just five times in the 1952–53 campaign, as Matt Busby's side dropped to eighth place.

Output:
2