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One of the essays discusses Søren Kierkegaard 's work on revelation and authority , " The Book on Adler " , in an effort to help reintroduce the book to modern philosophical readers .
 person: Søren Kierkegaard
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: Søren Kierkegaard 
Answer:
 person: Søren Kierkegaard