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The Brčko District was formed of the entire territory of the former Brčko municipality , of which 48 % ( including Brčko city ) was in the Republika Srpska , while 52 % was in the Federation of Bosnia and Herzegovina .
 Brčko, Brčko, Brčko, Republika Srpska, Federation, Bosnia, Herzegovina
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Brčko, Brčko, Brčko, Republika Srpska, Federation, Bosnia, Herzegovina