28320
With a density of 424 people per square kilometre , it would be the second most densely populated country in the European Union after Malta .
 organization: European Union; location: Malta
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: European Union, Malta 
Answer:
 organization: European Union; location: Malta