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The sponsored film " Mr. B Natural " became a cult hit when it was broadcast on the satirical television show " Mystery Science Theater 3000 " ; cast member Trace Beaulieu cited these educational shorts as his favorite to mock on the show .
 Mr. B Natural, Mystery Science Theater 3000, Trace Beaulieu
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Mr. B Natural, Mystery Science Theater 3000, Trace Beaulieu