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The first inhabitants of the region that is now Equatorial Guinea are believed to have been Pygmies , of whom only isolated pockets remain in northern Río Muni .
 Equatorial Guinea, Río Muni
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Equatorial Guinea, Río Muni