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He performed the solo viola part of Berlioz 's " Harold en Italie " multiple times , the first in September 1842 in Brussels under the direction of the composer .
 Berlioz, 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:
 Berlioz, Brussels