69043
He was succeeded by his younger brother Istemi in the western part and by his son Issik Qaghan in the eastern part .
 person: Istemi; person: Issik Qaghan
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: Istemi, Issik Qaghan 
Answer:
 person: Istemi; person: Issik Qaghan