91962
Eastward of the source , the watershed between the Congo and Zambezi basins is a well-marked belt of high ground , running nearly east-west and falling abruptly to the north and south .
 Congo, Zambezi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Congo, Zambezi