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Such comedians include Jay Leno , Conan O'Brien , Graham Norton , Jim Jefferies , James Corden , John Oliver , Jonathan Ross , David Letterman , and Chelsea Handler .
 Jay Leno, Conan O'Brien, Graham Norton, Jim Jefferies, James Corden, John Oliver, Jonathan Ross, David Letterman, Chelsea Handler
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:
 Jay Leno, Conan O'Brien, Graham Norton, Jim Jefferies, James Corden, John Oliver, Jonathan Ross, David Letterman, Chelsea Handler