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The show has been hosted by six comedians : Steve Allen , Jack Paar , Johnny Carson , Jay Leno , Conan O'Brien , and Jimmy Fallon .
 person: Steve Allen; person: Jack Paar; person: Johnny Carson; person: Jay Leno; person: Conan O'Brien; person: Jimmy Fallon
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: Steve Allen; person: Jack Paar; person: Johnny Carson; person: Jay Leno; person: Conan O'Brien; person: Jimmy Fallon