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The process of shrinking of the Caliphate in the tenth century was followed by the establishment of several Arab-ruled principalities in the region , chiefly the principality of Shirvan ( most of present-day Azerbaijan and southeast part of Dagestan ) ruled by the Mazyadid dynasty .
 Azerbaijan, Dagestan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Azerbaijan, Dagestan