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She enlisted the help of a team from the United States Geological Survey , which found the river was flowing into a canyon that was 580 feet deep , as well as very strong currents , including some flowing upriver .
 United States Geological Survey
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:
 United States Geological Survey