84943
He made two voyages sailing along the west coast of Africa in the 1480 s , exploring the Congo River and the coasts of the present-day Angola and Namibia .
 Africa, Congo River, Angola, Namibia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Africa, Congo River, Angola, Namibia