51008
Sofia and Plovdiv are the country 's air travel hubs , while Varna and Burgas are the principal maritime trade ports .
 location: Sofia; location: Plovdiv; location: Varna; location: Burgas
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: Sofia, Plovdiv, Varna, Burgas 
Answer:
 location: Sofia; location: Plovdiv; location: Varna; location: Burgas