8736
He remained in this post until his death ; " he was editing a manuscript on his death bed , a scientist until the bitter end " according to Christof Koch .
 person: Christof Koch
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: Christof Koch 
Answer:
 person: Christof Koch