33296
After World War II , Croatia became a single-party socialist federal unit of the SFR Yugoslavia , ruled by the Communists , but enjoying a degree of autonomy within the federation .
 Croatia, SFR Yugoslavia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Croatia, SFR Yugoslavia