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Early life Born in an intellectual family in communist Bulgaria , she read Philosophy and German and obtained her Doctorate under the guidance of Prof. Isaac Passy in Aesthetics and cultural history at Kliment Okhridski University in Sofia , in 1986 .
 Isaac Passy, 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:
 Isaac Passy, Sofia