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Although mainly produced on video and shot on studio sets , the series also incorporated innovative surreal escapism through film inserts , notably during scenes in which , whenever his mother-in-law is mentioned , Reggie visualises a hippopotamus trotting along .
 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