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The witch trials in the early modern period were a period of witch hunts between the 15th and 18th centuries , when across early modern Europe and to some extent in the European colonies in North America , there was a widespread hysteria that malevolent Satanic witches were operating as an organized threat to Christendom .
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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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