Question: Who was the vocalist for the band that the producer of the Mother Superior album "Sin" played guitar in?
Sentence (from "MC5"): "Crystallizing the counterculture movement at its most volatile and threatening", according to "AllMusic" critic Stephen Thomas Erlewine, the MC5's leftist political ties and anti-establishment lyrics and music positioned them as emerging innovators of the punk movement in the United States.
Relevant evidence: No