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The industry is concentrated mainly in Guayaquil , the largest industrial center , and in Quito , where in recent years the industry has grown considerably .
 Guayaquil, Quito
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Guayaquil, Quito