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It was originally presented by Ron Pickering but , when he died in 1991 , Gary Lineker , Linford Christie and Judy Simpson took over as presenter of the remaining one-off specials .
 Ron Pickering, Gary Lineker, Linford Christie, Judy Simpson
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:
 Ron Pickering, Gary Lineker, Linford Christie, Judy Simpson