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This Diogenes is sometimes confused with Diogenes of Sinope , to whom a similar list of tragedies is attributed by Diogenes Laertius .
 Diogenes, Diogenes of Sinope, Diogenes Laertius
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Diogenes, Diogenes of Sinope, Diogenes Laertius