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He is the younger brother of the late director , producer and actor Richard Attenborough , and older brother of the late motor executive John Attenborough .
 Richard Attenborough, John Attenborough
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Richard Attenborough, John Attenborough