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In 1969 , David Attenborough commissioned the snooker television series " Pot Black " to demonstrate the potential of colour television , with the green table and multi-coloured balls being ideal for showing off the advantages of colour broadcasting .
 person: David Attenborough
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