31866
In 1937 , Arne Tiselius developed the first sophisticated electrophoretic apparatus .
 person: Arne Tiselius
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: Arne Tiselius 
Answer:
 person: Arne Tiselius