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They have been part of the Duchy of Normandy since the tenth century , and Queen Elizabeth II is often referred to by her traditional and conventional title of Duke of Normandy .
 Duchy of Normandy, Elizabeth II, Normandy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Duchy of Normandy, Elizabeth II, Normandy