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After the crack-down , Bozveliev took part in the Tarnovo meeting of socialists in May 1891 .
 Bozveliev, Tarnovo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bozveliev, Tarnovo