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The " four parts of the world " or the four corners of the world refers to the Americas ( the " west " ) , Europe ( the " north " ) , Asia ( the " east " ) , and Africa ( the " south " ) .
 Americas, Europe, Asia, Africa
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Americas, Europe, Asia, Africa