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Du Bois simultaneously describes Brown as a revolutionary , prophet and martyr and declares him to " a man whose leadership lay not in his office , wealth or influence , but in the white flame of his utter devotion to an ideal . "
 person: Du Bois; person: Brown
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: Du Bois, Brown 
Answer:
 person: Du Bois; person: Brown