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The region is centered on two large cities : Ciudad Juárez , Chihuahua , Mexico and El Paso , Texas , USA .
 Ciudad Juárez, Chihuahua, Mexico, El Paso, Texas, USA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ciudad Juárez, Chihuahua, Mexico, El Paso, Texas, USA