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Corner Store ( 2010 ) is a documentary film about Yousef , an owner of a corner grocery store in San Francisco , produced and directed by Katherine Bruens and Sean Gillane , acting as both cinematographer and co-writer .
 San Francisco
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 San Francisco