634
Bernhard H. Korte ( born November 3 1938 in Bottrop  Germany  ) is a German mathematician and computer scientist a professor at the  University of Bonn  and an expert in combinatorial optimization .
 country of headquarters: Germany, University of Bonn
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 country of headquarters: Germany, University of Bonn