Question: El Narco: Inside Mexico's Criminal Insurgency is a non-fiction book, the book covers the frontline of which Mexican theater of the United States' War on Drugs, involving an ongoing low-intensity asymmetric war between the Mexican Government and various drug trafficking syndicates?
{'answer': 'Mexican Drug War', 'supporting_facts': [["El Narco: Inside Mexico's Criminal Insurgency", 2], ['Mexican Drug War', 0]]}