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He was immediately offered a ministerial post by Prince Mihailo , who described him as his " right arm " , but declined office , being opposed to the reactionary methods adopted by the prince 's government .
 Prince Mihailo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Prince Mihailo