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Silver Blaze is a 1937 British , black-and-white crime and mystery film , based loosely on Arthur Conan Doyle 's short story Silver Blaze .
 Arthur Conan Doyle
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 Conan Doyle