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According to the National Institute on Drug Abuse , a full year of drug treatment costs approximately $ 4,700 compared to over $ 30,000 for a year of imprisonment .
 National Institute on Drug Abuse
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:
 National Institute on Drug Abuse