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Explaining the purpose of writing this book in its preface , he says : In this age , the heretic credulity of people has lent itself to the influence of the doctrines of the Shi'ah so much so that many people in this country entertain doubts regarding the validity of the installation of the Orthodox Caliphs .
 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