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williams , who is regarded as `` the first among equals '' within the communion of leaders that represent 160 countries and some 75 million anglicans worldwide , has sought to find a delicate balance within the deeply divided group of primates .
 member collection: communion, leaders
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
 Entity Pairs:  communion, leaders 
Answer:
 member collection: communion, leaders