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He spent some time as a teacher , at Rossall School , Llandovery College ( for two years ) and Ruthin School ( for five years ) .
 Rossall School, Llandovery College, Ruthin School
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rossall School, Llandovery College, Ruthin School