Question: Who was the chair of a commission which investigated the riot associated with the killing of George Jackson at San Quentin State Prison in 1971?
Sentence (from "Attica Prison riot"): On September 9, 1971, two weeks after the killing of George Jackson at San Quentin State Prison, about 1,000 of the Attica prison's approximately 2,200 inmates rioted and took control of the prison, taking 42 staff hostage.
Relevant evidence: Yes