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According to Gulag historian Anne Applebaum , " The Gulag Archipelago " s rich and varied authorial voice , its unique weaving together of personal testimony , philosophical analysis , and historical investigation , and its unrelenting indictment of communist ideology made it one of the most influential books of the 20th century .
 person: Anne Applebaum
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: Anne Applebaum 
Answer:
 person: Anne Applebaum