7292
The widespread belief that he died a virgin has been commented on by writers such as mathematician Charles Hutton , economist John Maynard Keynes , and physicist Carl Sagan .
 person: Charles Hutton; person: John Maynard Keynes; person: Carl Sagan
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: Charles Hutton; person: John Maynard Keynes; person: Carl Sagan