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The importance of close cooperation between UNOMIL , ECOMOG and the Organisation of African Unity ( OAU ) was stressed .
 organization: Organisation of African Unity
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Organisation of African Unity 
Answer:
 organization: Organisation of African Unity