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The General Secretary of the  Congress of South African Trade Unions   Zwelinzima Vavi  wrote the following letter to the trustees of the Labour Job Creation Trust on 9 April 2008 : .
 top members employees: Congress of South African Trade Unions, Zwelinzima Vavi
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:  Congress of South African Trade Unions, Zwelinzima Vavi 
Answer:
 top members employees: Congress of South African Trade Unions, Zwelinzima Vavi