Question: What former leader of the Gracie Humaitá school in Rio de Janeiro, Brazil, with the help of his father, demonstrated the Ashi-Hishigi in several medias?
Sentence (from "Ashi-Hishigi"): Ashi-Hishigi also called an Achilles lock or simply an ankle lock, is a technique described in both "The Canon Of Judo" by Kyuzo Mifune and "Brazilian Jiu-Jitsu, Theory and Technique" by Renzo Gracie and Royler Gracie as well as demonstrated in the video, The Essence Of Judo.
Relevant evidence: Yes