194794
The first known report of the association was by the German ophthalmologist Moritz Litten in 1881 .
 person: Moritz Litten
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: Moritz Litten 
Answer:
 person: Moritz Litten