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Between 1785 and 1798 , Giacomo Casanova , the so-called secretary of the 18th century , spent the last thirteen years of his amazing life in Duchcov .
 Giacomo Casanova, Duchcov
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Giacomo Casanova, Duchcov