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Three Russian servicemen were killed on Saturday when unidentified gunmen attacked guards at an anti-aircraft installation outside Moscow , Interfax news agency said .
 location: Moscow; else: Russian; organization: Interfax
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:
 location: Moscow; else: Russian; organization: Interfax