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Her mother was the daughter of Gian Galeazzo Visconti , Duke of Milan , and Isabella of France , who was a daughter of King John II of France .
 Gian Galeazzo Visconti, Duke, Isabella of France, John II of France
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gian Galeazzo Visconti, Duke, Isabella of France, John II of France