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A Short History of Christianity is a non-fiction book on the history of the Christian religion written by Australia n historian Geoffrey Blainey .
 location: Australia; person: Geoffrey Blainey
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: Australia, Geoffrey Blainey 
Answer:
 location: Australia; person: Geoffrey Blainey