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Citizens from , Chile , the world 's southernmost city and capital of the , remained on strike Wednesday after Sebastián Piñera announced an increase in natural gas prices by 16.8 percent , in that region .
 Chile, Sebastián Piñera
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Chile, Sebastián Piñera