Input (grade 13): Guerrero wrestled in Mexico and Japan and in several major professional wrestling promotions in the United States He wrestled in Extreme Championship Wrestling (ECW), World Championship Wrestling (WCW), and in World Wrestling Entertainment (WWE).
Output (grade 12): He wrestled in Mexico, Japan, Extreme Championship Wrestling (ECW), World Championship Wrestling (WCW) and, most famously, in World Wrestling Entertainment (WWE).