245698
He is a rotund mad scientist with an IQ of 300 , who plans to conquer the world in order to build his Eggman Empire , and is the archenemy of Sonic the Hedgehog .
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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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