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In most developed countries local or national governments continue to provide such services , the biggest exceptions being the U.S. and the UK , where private provision is arguably proportionally more significant .
 U.S., UK
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:
 U.S., UK