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** '' Duchy of Gaeta '' ' - John I , Hypatus of Gaeta ( 906–933 )
 Duchy of Gaeta, John I, Hypatus of Gaeta
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 Gaeta, John I, Hypatus of Gaeta