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Insurgent Amnesty Program Captain Cook was commanding the 3rd Armored Cavalry Regiment 's C troop in the northern Tigris Valley in Salahuddin province and had been pursuing a leader of Al Queda , who eventually decided to stop running and talk .
 Cook, Salahuddin province, Al Queda
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cook, Salahuddin province, Al Queda