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In his speech , Yeltsin advocated that German troops should participate more in UN peacekeeping missions , and that German troops participating in the United Nations peacekeeping forces and stationed in the Balkan region deserve welcome .
 Yeltsin, German, UN, German, United Nations, Balkan
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:
 Yeltsin, German, UN, German, United Nations, Balkan