4170
He also helped to raise funds - alongside more than 20 other artists - in the largest concert ever held in sub-Saharan Africa .
 location: sub-Saharan Africa
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: sub-Saharan Africa 
Answer:
 location: sub-Saharan Africa