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Sinha , described as ‘ erudite and knowledgeable police chief ’ by noted sociologist-journalist , Arvind N Das , was a poet , critic , journalist , and a close associate of Jayprakash Narayan .
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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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