83231
The move was modeled on the establishment of a multi-national force in 2015 by Chad , Cameroon , Niger and Nigeria to oppose Boko Haram in the Lake Chad basin .
 Chad, Cameroon, Niger, Nigeria, Boko Haram, Lake, Chad
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chad, Cameroon, Niger, Nigeria, Boko Haram, Lake, Chad