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In 1977 , Hobson and McCarley developed the activation synthesis theory of dreaming that said that dreams do not have meanings and are the result of the brain attempting to make sense of random neuronal firing in the cortex .
 person: Hobson; person: McCarley
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: Hobson, McCarley 
Answer:
 person: Hobson; person: McCarley