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Other formula-based calendars can have lengths which are further out of step with the solar cycle : for example , the Julian calendar has an average length of 365.25 days , and the Hebrew calendar has an average length of 365.2468 days .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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