7754
He later moved to  Ottawa  and worked first for the Public Service Alliance of Canada ( Ottawa Citizen 24 September 2003 ) and later for the  Canadian Union of Public Employees  .
 city of headquarters: Ottawa, Canadian Union of Public Employees
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:  Ottawa, Canadian Union of Public Employees 
Answer:
 city of headquarters: Ottawa, Canadian Union of Public Employees