16999
They were important trading hubs , and Viking Dublin was the biggest slave port in western Europe .
 location: Viking; location: Dublin; location: Europe
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: Viking, Dublin, Europe 
Answer:
 location: Viking; location: Dublin; location: Europe