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BenBella Books published Bell 's afterword to the environmental science fiction classic The Sheep Look Up by John Brunner .
 person: Bell; person: John Brunner
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: Bell, John Brunner 
Answer:
 person: Bell; person: John Brunner