44948
Next the meeting in August 1966 at which Walter Hayes , Keith Duckworth , Colin Chapman and Harley Copp discuss plans for the new engine is shown , probably staged sometime later .
 Walter Hayes, Keith Duckworth, Colin Chapman, Harley Copp
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:
 Walter Hayes, Keith Duckworth, Colin Chapman, Harley Copp