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Russian Prime Minister Viktor Chernomyrdin said on Friday that President Boris Yeltsin , who is vacationing outside Moscow , had backed security chief Alexander Lebed 's peace plan for Chechnya , Interfax news agency said .
 organization: Interfax; person: Alexander Lebed; location: Moscow; person: Boris Yeltsin; person: Viktor Chernomyrdin; else: Russian; location: Chechnya
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 organization: Interfax; person: Alexander Lebed; location: Moscow; person: Boris Yeltsin; person: Viktor Chernomyrdin; else: Russian; location: Chechnya