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Final French-language broadcaster RTBF was in charge of the selection of the Belgian entry for the 1966 Contest , held at the RTBF studios in Brussels .
 RTBF, RTBF, Brussels
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 RTBF, RTBF, Brussels