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The Caucasus region was conquered by the Ottomans , Mongols , local kingdoms and khanates , as well as , once again , Iran .
 location: Caucasus; location: Ottomans; location: Iran
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Caucasus; location: Ottomans; location: Iran