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The Duchess Isabella effected a truce with Antoine , but the duke remained a prisoner of the Burgundians until April 1432 , when he recovered his liberty on parole on yielding up as hostages his two sons , John and Louis .
 person: Isabella; person: Antoine; person: John; person: Louis
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Isabella, Antoine, John, Louis 
Answer:
 person: Isabella; person: Antoine; person: John; person: Louis