27820
The supposed subspecies " nigra " form Belgium has turned out to be a chance form , rather than a distinct population .
 location: Belgium
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Belgium 
Answer:
 location: Belgium