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The 2011 OFC U-20 Championship , was the 18th OFC Under 20 Qualifying Tournament , the biennial football championship of Oceania ( OFC ) .
 OFC, OFC, OFC
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 OFC, OFC, OFC