6318
Christopher Ehret ( 2002 : 35 – 36 ) asserts that Proto-Afroasiatic was spoken c .
 person: Christopher Ehret
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: Christopher Ehret 
Answer:
 person: Christopher Ehret