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After a two-year work as a lecturer in Frankfurt  Kohlrausch  was appointed a professor of physics at the  University of  ( 1866 70 ) .
 employee of: Kohlrausch, University of
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Kohlrausch, University of 
Answer:
 employee of: Kohlrausch, University of