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Following the end of World War I , Sionidis , as president of Matsikovo community , retrieved the remains of nine evzones who had been killed by the Bulgarians during the Second Balkan War , and buried them in his village .
 Sionidis
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sionidis