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In 1912 Casimir Funk coined the term vitamin to label a vital factor in the diet : from the words " vital " and " amine , " because these unknown substances preventing scurvy , beriberi , and pellagra , were thought then to derive from ammonia .
 Casimir Funk
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 Casimir Funk