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Belyov ( ) is a town and the administrative center of Belyovsky District of Tula Oblast , Russia , located on the left bank of the Oka River .
 Belyov, Tula Oblast, Russia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Belyov, Tula Oblast, Russia