6879
The 18-meter - tall walls built by Theodosius II were , in essence , impregnable to the barbarians coming from south of the Danube river , who found easier targets to the west rather than the richer provinces to the east in Asia .
 person: Theodosius II; location: Danube; location: Asia
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: Theodosius II, Danube, Asia 
Answer:
 person: Theodosius II; location: Danube; location: Asia