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Sergey Leonidovich Markov ( ) ( July 7 , 1878 - June 25 , 1918 ) - Russian army general and one of the founders of the Volunteer Army counterrevolutionary force of the White movement in the southern Russia during Russian Civil War .
 Sergey, Markov
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sergey, Markov