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After graduating from University he taught for a several years at the Ahmadiyya Muslim Secondary School and Prince of Wales Secondary School s in Freetown before launching a career in the field of development in 1982 as Projects Officer at the Catholic Relief services .
 Secondary, Prince of Wales Secondary School, Freetown
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Secondary, Prince of Wales Secondary School, Freetown