197945
According to the protocol , Heiser underwent the first stage of torture before confessing that knew how to perform the Wolf-Segen , which he had learned from a friend some fifty years earlier , in Innsbruck , and had made his living by performing it for the peasantry .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None