1975
Ilkka Maunu Olavi Niiniluoto ( born March 12 1946 in  Helsinki  Finland ) is a Finnish philosopher and mathematician serving as a professor of philosophy at the  University of Helsinki  since 1981 .
 city of headquarters: Helsinki, University of Helsinki
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:
 city of headquarters: Helsinki, University of Helsinki