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Marcellus Empiricus , a medical writer of the fifth century , mentioned that " for the spleen there is a special remedy which was recently demonstrated by the patriarch Gamaliel on the basis of approved experiments . "
 person: Marcellus Empiricus
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: Marcellus Empiricus 
Answer:
 person: Marcellus Empiricus