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These four colleges , Centennial College , George Brown College , Humber College , and Seneca College , operate several campuses throughout the city .
 Centennial College, George Brown College, Humber College, Seneca College
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Centennial College, George Brown College, Humber College, Seneca College