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When the character was spun off into " Frasier " , his father became a central character with , in a case of retroactive continuity , the explanation that Frasier was embarrassed about his father 's lowbrow attitudes and thus claimed his death .
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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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