1465
Returning to Canada Thomson worked for a short time at the National Film Board of Canada before being invited to served as Associate Private  Secretary  to Canadian Prime Minister  Louis St. Laurent  where he remained until 1958 .
 title of person: Secretary, Louis St. Laurent
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:
 title of person: Secretary, Louis St. Laurent