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There he was promoted to Warden of St. Deiniol 's Library , and encouraged Gordon Dunstan who was in a junior position , before becoming Canon of St. George 's Chapel , Windsor .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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