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David Coupar Thomson remained chairman of the company until his death , aged 93 , in 1954 ; but it was his nephew , Harold ( Brian 's father ) , who drove the expansion of its publishing interests , particularly in the field of comics .
 David Coupar Thomson, Harold, Brian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 David Coupar Thomson, Harold, Brian