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Disc 1 of each set contained an introduction to the season by Straczynski , while disc 6 included featurettes containing interviews with various production staff , as well as information on the fictional universe , and a gag reel .
 person: Straczynski
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: Straczynski 
Answer:
 person: Straczynski