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The film 's visual effects supervisor , Kevin Mack , and the visual effects team at Sony Pictures Imageworks handled the difficult task of creating computer-generated fire on a shot-by-shot basis .
 Kevin Mack, Sony Pictures Imageworks
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Kevin Mack, Sony Pictures Imageworks