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Dobrujans or Dobrujan Bulgarians ( Bulgarian : Добруджанци or Добруджански българи ) — also spelled Dobrudžans , Dobrudzans , and Dobrudjans — is a regional , ethnographic group of ethnic Bulgarians , inhabiting or originating from Dobruja .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
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