From an interview with Earth (who’ve played Supersonic) on Pitchfork. Talking about Black Sabbath:
Pitchfork: Have you ever had any kind of personal interaction with any of the Sabbath people?
Dylan Carlson, Earth: No. Sabbath is from Birmingham, England and Tony Iommi supposedly came to a festival we played there once, but I didn’t actually see him. The two women who put on that festival are always trying to get the Birmingham City Council to recognize that it’s the city of heavy metal and put up a plaque or a statue to acknowledge it.
Pitchfork: That’s not a bad idea.