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In 1997 , the two countries signed a far-reaching friendship treaty , which calls for mutual assistance in the event of a military threat to either party and allows Russian border guards to patrol Armenia 's frontiers with Turkey and Iran .
 Armenia, Turkey, Iran
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Armenia, Turkey, Iran