Question: Which survivor of the mass shooting that took place on October 16, 1991, at a Luby's restaurant in Killeen, Texas, United States became a leading advocate of an individual's right to carry a concealed weapon?
Sentence (from "Luby's shooting"): The Luby's shooting, also known as the Luby's massacre, was a mass shooting that took place on October 16, 1991, at a Luby's restaurant in Killeen, Texas, United States.
Relevant evidence: Yes