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The first included the great baron s , who held the advocateship ( avouerie ) of an abbey or abbeys rather as an office than a fief , though they were indemnified for the protection they afforded by a domain and preach revenues granted by the abbey : thus the " duke of avoué " .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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