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The following held the office in  Nigeria  while it was a Commonwealth realm :  Abubakar Tafawa Balewa  held office as prime minister ( and head of government ) of the Federation of Nigeria during this period .
 employee of: Nigeria, Abubakar Tafawa Balewa
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:
 employee of: Nigeria, Abubakar Tafawa Balewa