7931
The University of Arizona conducted a study in 2004 , which indicated that 14 to 15 % of United States edible food is untouched or unopened , amounting to $ 43 " billion worth of discarded , but edible , food .
 University of Arizona, United States
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:
 University of Arizona, United States