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Christendom ultimately was led into specific crisis in the late Middle Ages , when the kings of France managed to establish a French national church during the 14th century and the papacy became ever more aligned with the Holy Roman Empire of the German Nation .
 France, Holy Roman Empire
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 France, Holy Roman Empire