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Players take on the role of an unnamed soldier assigned to a UN-mandated research team deployed to the South Pole to investigate an abnormal area in the region dubbed as the " Schwarzwelt " ( German for " black world " ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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