Question: Mario Cárdenas Guillén is the brother of the Mexican drug lord who was the former leader of what group?
Sentence (from "Joaquín &quot;El Chapo&quot; Guzmán"): Joaquín Archivaldo Guzmán Loera (] ; born on 25 December 1954 or 4 April 1957) is a Mexican drug lord who headed the Sinaloa Cartel, a criminal organization named after the Mexican Pacific coast state of Sinaloa where it was formed.
Relevant evidence: No