16860
It was directed by William Hanna and Joseph Barbera , produced by Fred Quimby and animated by Ken Muse , Ray Patterson , Irven Spence and Pete Burness .
 William Hanna, Joseph Barbera, Fred Quimby, Ken Muse, Ray Patterson, Irven Spence, Pete Burness
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:
 William Hanna, Joseph Barbera, Fred Quimby, Ken Muse, Ray Patterson, Irven Spence, Pete Burness