14552
The previous ruling prince of Bulgaria , Alexander of Battenberg , had abdicated in 1886 after a pro-Russian coup , only seven years after he had been elected .
 Bulgaria, Alexander of Battenberg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bulgaria, Alexander of Battenberg