10816
In the seventeenth and eighteenth centuries , ecclesiastical historians and the writers of the numerous monographs concerning local churches , monasteries , ecclesiastical institutions , etc. were aided by the officials of the archives , themselves often scholarly investigators .
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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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