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O'Farrell initially served as a missionary in Sheffield England before returning to  Ireland  where he became the Professor of Ecclesiastical History and of Higher Mathematics and Physics at  All Hallows College  in Dublin ; subsequently taking up a post as Professor of Moral Theology at the Irish College in Paris .
 country of headquarters: Ireland, All Hallows College
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: Ireland, All Hallows College