Mention folk music to the average listener and the list of usual suspects come to mind: Bob Dylan, Joni Mitchell, Woodie Guthrie, etc. Talk to SOJA lead singer/guitarist Jacob Hemphill, however, and you’ll walk away with a different perspective. “To me, Rage Against The Machine, Wu -Tang Clan, Sade, Johnny Cash, Bob Marley – they’re all folk artists,” he says. “There’s no difference between Raekwon saying, ‘I grew up on the crime side