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But in 1971 , following the appointment of Brian Llewellyn as TTO 's 7th Managing Director , a whole new Board of Directors was created , with the travel trade veteran Norman Corkhill as company chairman .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None