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The idea of broadcasting snooker , then still a minor sport , was the brainchild of David Attenborough who was the controller of BBC2 at the time .
 person: David Attenborough; organization: BBC2
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:
 person: David Attenborough; organization: BBC2