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Establishment The inauguration ceremony for the ministry establishment was held on 21 May 2012 , in which the ceremony was attended by President Ma Ying-jeou and Premier Sean Chen .
 Ma Ying-jeou, Sean Chen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ma Ying-jeou, Sean Chen