Detailed Instructions: In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Problem:Passage: From 1931, Hermes studied mathematics, physics, chemistry, biology and philosophy at the University of Freiburg. In 1937 he passed the state examination in Munster and was attending there in 1938 when the physicist Adolf Kratzer was present. After that he went on a scholarship to the University of Gottingen 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 Munster, where he turned back to the subject of mathematical logic.
Link Information: During World War II he was a soldier on the Channel Island of Jersey until 1943 Question: When did Hans Hermes begin working on encryption methods?
Solution:
Answer: At the end of the war