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sometimes referred to as " polar lights " ( aurora polaris ) , " northern lights " ( aurora borealis ) , or " southern lights " ( aurora australis ) , is a natural light display in the Earth 's sky , predominantly seen in high-latitude regions ( around the Arctic and Antarctic ) .
 Arctic, Antarctic
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Arctic, Antarctic