5587
Second and more important , there were continuous movements of new peoples since the time of Emperor Severus Alexander .
 person: Severus Alexander
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: Severus Alexander 
Answer:
 person: Severus Alexander