Task: Question Generation
Input (English): With regards to Mexican drug cartels, Oklahoma City has traditionally been the territory of the notorious Juárez Cartel, but the Sinaloa Cartel has been reported as trying to establish a foothold in Oklahoma City. There are many rival gangs in Oklahoma City, one whose headquarters has been established in the city, the Southside Locos, traditionally known as Sureños.
Output (English): What cartel has been known to be in Oklahoma city?