61482
However , his major editors , Simon Wilkin in the nineteenth century ( 1834 ) and Sir Geoffrey Keynes in the twentieth ( 1924 ) , summarily dismissed it .
 Simon Wilkin, Geoffrey Keynes
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:
 Simon Wilkin, Geoffrey Keynes