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Poolhall Junkies is a 2002 drama thriller film written , starring and directed by Mars Callahan .
 person: Mars Callahan
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Mars Callahan 
Answer:
 person: Mars Callahan