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In 1926 war-games and tests began at Kazan and Lipetsk in the RSFSR .
 Kazan, Lipetsk, RSFSR
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kazan, Lipetsk, RSFSR