Unbound Allstars were a one-off collaboration of various hip-hop artists who recorded the track "Mumia 911" supporting the release of death row inmate, Mumia Abu-Jamal.
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KRS-One, Chumbawamba, Rage Against the Machine, Unbound Allstars, Saul Williams, Anti-flag, Man Is the Bastard, Immortal Technique and Snoop Dogg are among artists to have authored those references.