32471
Some of the borders of Cameroon follow rivers , including the Aïna , Akwayafe , and Ntem or Campo .
 Cameroon, Aïna, Akwayafe, Ntem, Campo
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cameroon, Aïna, Akwayafe, Ntem, Campo