90373
But when the English walked out of peace talks during the Congress of Arras in 1435 , the Duke of Burgundy stayed and concluded the Treaty of Arras with the French King , thus switching sides in the war .
 person: Duke
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: Duke 
Answer:
 person: Duke