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He was not a Marxist , although he was impressed by Karl Marx himself , whom he thought was a great historian if possibly " an unbearable man " personally .
 organization: Marxist; person: Karl Marx
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: Marxist, Karl Marx 
Answer:
 organization: Marxist; person: Karl Marx