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One of his most prominent roles was the genocidal villain Brian J. Mason in Bubblegum Crisis Tokyo 2040 , the voice type of which is referred to by cast and crew-mates as the " slime that walks like a man " voice .
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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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