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Many of his characters are driven by curiosity or scientific endeavor , and in many of his stories the knowledge they uncover proves Promethean in nature , either filling the seeker with regret for what they have learned , destroying them psychologically , or completely destroying the person who holds the knowledge .
 Promethean
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Promethean