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The summit , which is being sponsored by the European Union , is meant to show the Balkan states that the EU is preparing to welcome them into the European family .
 the European Union, Balkan, EU, European
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 the European Union, Balkan, EU, European