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A " day " , understood as the span of time it takes for the Earth to make one entire rotation with respect to the celestial background or a distant star ( assumed to be fixed ) , is called a " stellar day " .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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