51461
They were widely encouraged by development agencies from the middle of the 1980 s in the Sahel area of Africa .
 location: Sahel; location: Africa
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: Sahel, Africa 
Answer:
 location: Sahel; location: Africa