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In August 2002 , John Singleton , who critically praised the first film , was announced to direct the second in place of Rob Cohen , who left the franchise after directing the previous installment .
 John Singleton, Rob Cohen
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:
 John Singleton, Rob Cohen