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It's our pleasure to announce that our two formations in parliament have agreed to work together said Morgan Tsvangirai leader of the  Movement for Democratic Change  speaking alongside  Arthur Mutambara  head of a faction of the MDC at a joint press conference in Johannesburg .
 top members employees: 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:
 top members employees: Movement for Democratic Change, Arthur Mutambara