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O'Brien was appointed Dundalk 's under 20 captain and he led the Lilywhites in their 2008-09 under 20 campaign .
 O'Brien, Dundalk
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 O'Brien, Dundalk