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The Antiphonary of Bangor is an ancient Latin manuscript , supposed to have been originally written at Bangor Abbey in modern day Northern Ireland .
 Bangor, Bangor, Northern Ireland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bangor, Bangor, Northern Ireland