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Therefore after the Revolution of 1979 M. Oskoui was elected to the presidency of the National Centre for Iranian Theatre in further recognition of his work and was re-elected to the same office for each of the three successive two year terms .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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