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A ceremony marking the official opening of the new UN mission in  Burundi  was held Tuesday and presided over by Burundi's President  Pierre Nkurunziza  .
 employee of: Burundi, Pierre Nkurunziza
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: Burundi, Pierre Nkurunziza