Question: What former Mexican drug lord is the nephew of the former leader of the Gulf Cartel (Spanish: "Cártel del Golfo" ) and Los Zetas?
{'answer': 'Rafael Cárdenas Vela', 'supporting_facts': [['Rafael Cárdenas Vela', 0], ['Rafael Cárdenas Vela', 1], ['Osiel Cárdenas Guillén', 0]]}