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Idris ' government was increasingly unpopular by the latter 1960 s ; it had exacerbated Libya 's traditional regional and tribal divisions by centralizing the country 's federal system to take advantage of the country 's oil wealth .
 Idris, Libya
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Idris, Libya