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“ They would not have been of much use to [ Patrick ] had they not been fluent speakers of the Celtic language , and we may assume that they were Celts , either from Armorica , Cornwall , or Wales .
 Patrick, Cornwall, Wales
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Patrick, Cornwall, Wales