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Rojas lost his title to Suriyan Sor Rungvisai in Sisaket , Thailand on August 19 , 2011 .
 Rojas, Suriyan Sor Rungvisai, Sisaket
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rojas, Suriyan Sor Rungvisai, Sisaket