2794
Western powers regard diplomatic normalisation between Croatia and Serbia , twin pillars of the old multinational federal Yugoslavia , as a crucial step towards a lasting peace in the Balkans .
 Serbia, Yugoslavia, Croatia, Western, Balkans
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:
 Serbia, Yugoslavia, Croatia, Western, Balkans