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Most , however , migrated here voluntarily in the beginning of the 20th century , after the revolutionary events of 1905 and as a result of the agrarian reforms by Pyotr Stolypin .
 Pyotr Stolypin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pyotr Stolypin