96540
The use of the term mired dates back to Irwin G. Priest 's observation in 1932 that the just noticeable difference between two illuminant s is based on the difference of the reciprocals of their temperatures , rather than the difference in the temperatures themselves .
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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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