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The Pineridge Bluegrass Folklore Society ( PBFS ) is a non-profit organization initiated in 1977 for the purpose of preserving and promoting bluegrass music in the Durham Region , Ontario , Canada .
 Durham Region, Ontario, Canada
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Durham Region, Ontario, Canada