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Notable among these were David Letterman , Robin Williams , Jay Leno , Jerry Seinfeld , Arsenio Hall , Jeff Foxworthy , Ellen DeGeneres , Joan Rivers , David Brenner , Tim Allen , Drew Carey , Howie Mandel and Roseanne Barr .
 person: David Letterman; person: Robin Williams; person: Jay Leno; person: Jerry Seinfeld; person: Arsenio Hall; person: Jeff Foxworthy; person: Ellen DeGeneres; person: Joan Rivers; person: David Brenner; person: Tim Allen; person: Drew Carey; person: Howie Mandel; person: Roseanne Barr
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:
 person: David Letterman; person: Robin Williams; person: Jay Leno; person: Jerry Seinfeld; person: Arsenio Hall; person: Jeff Foxworthy; person: Ellen DeGeneres; person: Joan Rivers; person: David Brenner; person: Tim Allen; person: Drew Carey; person: Howie Mandel; person: Roseanne Barr