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The administrative center of the oblast , Yuzhno-Sakhalinsk , a city of about 175,000 , has a large Korean minority , typically referred to as Sakhalin Koreans , who were forcibly brought by the Japanese during World War II to work in the coal mines .
 Yuzhno-Sakhalinsk
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yuzhno-Sakhalinsk