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Finally , he is guided by the intuition of one of his trusted subordinates ( actually an Arisian living as a human being ) to Arisia , a heretofore unapproachable planet where he is greeted by a benevolent and telepathic Arisian who presents him a Lens .
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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:
 None