Question: The Brink's robbery of 1981 was an armed robbery and three related murders committed on October 20, 1981, which were carried out by six Black Liberation Army members, including Mutulu Shakur, he was a close friend of who?
Sentence (from "Mutulu Shakur"): He was a proponent of the Republic of New Afrika and a close friend of Geronimo Pratt.
Relevant evidence: Yes