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" Even the critically well-received " The Left Hand of Darkness " , in addition to critique from feminists , was described by Alexei Panshin as a " flat failure " .
 Alexei Panshin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alexei Panshin