78764
" The purpose of a system is what it does " ( " POSIWID " ) is a systems thinking heuristic coined by Stafford Beer .
 Stafford Beer
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:
 Stafford Beer