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At the time , Jim Davis was publishing a drag racing magazine called Super Stock , so with the existing production staff , the printer , and the distribution network already in place , Jim Davis was planning to add a second magazine to his business .
 None
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:  
Answer:
 None