996
In 1885 , anatomist Walther Flemming delivered a more precise description of the process of programmed cell death .
 person: Walther Flemming
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: Walther Flemming 
Answer:
 person: Walther Flemming