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In just 500 million acres of the Congo Basin owned by 8 countries the weight equivalent to 40.7 million humans is removed each year ( or 740,000 bull elephants ) .
 Congo Basin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Congo Basin