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But Chernomyrdin took pains at the weekend to insist Lebed was playing for a united team and that the proposals he took to rebel chief-of-staff Aslan Maskhadov had been agreed by Yeltsin .
 Lebed, Chernomyrdin, Yeltsin, Aslan Maskhadov
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Lebed, Chernomyrdin, Yeltsin, Aslan Maskhadov