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Those interviewed as thought leaders include Philip Bobbitt , John Chambers , Arie de Geus , Gary Hamel , Charles Handy , Daniel Kahneman , John Kao , Sylvia Nasar , Carlota Perez , Paul Romer , Anne-Marie Slaughter , and Meg Wheatley .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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