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Bright Hub uses proprietary tools to collect and aggregate expert content into subject-specific " channels " modeled after the concept of television channel s. As of February 2009 , Bright Hub was receiving about 800,000 visitors monthly .
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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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