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South Africa issues " total travel ban " to non-citizens travelling from Guinea , Liberia & Sierra Leone over #Ebola virus
 South Africa, Guinea, Liberia, Sierra Leone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 South Africa, Guinea, Liberia, Sierra Leone