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Roger Ebert praised it as " a diabolical movie that exists sneakily between a western and a thriller , between a film noir and a black comedy , " and gave the film three-and-a-half stars out of four .
 Roger Ebert
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Roger Ebert