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Mbeki has been mediating power-sharing talks between Zimbabwe President Robert Mugabe  Movement for Democratic Change  leader Morgan Tsvangirai and the head of a smaller MDC faction  Arthur Mutambara  .
 members: Movement for Democratic Change, Arthur Mutambara
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:
 members: Movement for Democratic Change, Arthur Mutambara