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On 11 August 2006 , Chad and Sudan resumed relations at the behest of Libyan leader Muammar Gaddafi .
 Chad, Sudan, Muammar Gaddafi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chad, Sudan, Muammar Gaddafi