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Arthur Koestler : The Story of a Friendship is a book by George Mikes published in 1983 , soon after Arthur Koestler ’s suicide .
 Arthur Koestler, George Mikes, Arthur Koestler
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Arthur Koestler, George Mikes, Arthur Koestler