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The Escorial Taktikon , written a few years later , shows the existence of two stratopedarchai , one of the East ( Anatolia ) and one of the West ( the Balkans ) .
 Balkans
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Balkans