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The Enola Holmes Mysteries is a young-adult fiction series of detective novel s by American author Nancy Springer , starring Enola Holmes as the fourteen-year-old sister of an already-famous Sherlock Holmes , twenty years her senior .
 Nancy Springer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nancy Springer