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Film critic Roger Ebert called " Chungking Express " , a critically acclaimed 1994 art film , " largely a cerebral experience " that one enjoys " because of what you know about film " .
 Roger Ebert
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Roger Ebert