18974
He is also known for his discovery of ketenes and of the Staudinger reaction .
 person: Staudinger
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: Staudinger 
Answer:
 person: Staudinger