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Major Samuel P.N. Cook , USA ( born February 1 , 1978 ) is a former commander of the United States Army ’s 3rd ACR Crazyhorse Scout Troop who was responsible for implementing an insurgent amnesty program in the Sharqat area of Iraq 's Salahuddin province in November 2007 .
 Samuel P.N. Cook, USA, Salahuddin province
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Samuel P.N. Cook, USA, Salahuddin province