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His distinctive speaking voice attracted attention and led to work for BBC Radio , which his biographer Sheridan Morley calls " a medium he made his own for seventy years " .
 organization: BBC Radio; person: Sheridan Morley
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:
 organization: BBC Radio; person: Sheridan Morley