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During the Abraham Lincoln assassination trial in May & June 1865 , Frederick Stone and Thomas Ewing , Jr. appeared as defense counsels for Dr. Samuel Mudd .
 person: Frederick Stone; person: Dr. Samuel Mudd
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: Frederick Stone, Dr. Samuel Mudd 
Answer:
 person: Frederick Stone; person: Dr. Samuel Mudd