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Patrons of the festival have included Chinua Achebe , John Berger , Mahmoud Darwish , Seamus Heaney , Harold Pinter , Philip Pullman and Emma Thompson .
 John Berger, Mahmoud Darwish, Seamus Heaney, Harold Pinter, Philip Pullman, Emma Thompson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 John Berger, Mahmoud Darwish, Seamus Heaney, Harold Pinter, Philip Pullman, Emma Thompson