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" So far 75 percent has been returned with the land restitution almost completed in some regions like Southeastern Bulgaria but lagging behind in other areas , predominantly in the mountains , " the official told a news conference .
 Southeastern Bulgaria
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Southeastern Bulgaria