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The " Oxford English Dictionary " defines the term " whipper-in " as , " a huntsman 's assistant who keeps the hounds from straying by driving them back with the whip into the main body of the pack " .
 media: Oxford English Dictionary
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 media: Oxford English Dictionary