78199
It was written by Mort Walker ’s sons Brian , Morgan , Greg and Neal , who signed their work as “ The Walker Brothers .
 person: Mort Walker; person: Walker
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: Mort Walker, Walker 
Answer:
 person: Mort Walker; person: Walker