20477
He conducted the biopsy the following morning , after which he sent tissue samples to the distinguished pathologist Rudolf Virchow for microscopic examination .
 person: Rudolf Virchow
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: Rudolf Virchow 
Answer:
 person: Rudolf Virchow