50903
It provided for a much smaller state , the Principality of Bulgaria , only comprising Moesia and the region of Sofia , and leaving large populations of ethnic Bulgarians outside the new country .
 Principality of Bulgaria, Moesia, Sofia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Principality of Bulgaria, Moesia, Sofia