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December contains the winter solstice in the Northern Hemisphere , the day with the fewest daylight hours , and the summer solstice in the Southern Hemisphere , the day with the most daylight hours ( excluding polar regions in both cases ) .
 Northern Hemisphere, Southern Hemisphere
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Northern Hemisphere, Southern Hemisphere