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The Cooperative State Research , Education , and Extension Service at New Mexico State University recommends a mix of not more than 1 / 3 clay , not less than 1 / 2 sand , and never more than 1 / 3 silt .
 Cooperative State Research , Education , and Extension Service, New Mexico State University
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:
 Cooperative State Research , Education , and Extension Service, New Mexico State University