Question: When was the American singer, guitarist, songwriter, and producer born who is known for his work in the hard rock bands Rainbow and also performed with Jason Hartless?
Sentence (from "Beatrice (band)"): Although he was not a trained musician or a talented singer, his stage persona, together with his professional rock instrumentalist partners, made the group one of the most popular hard rock bands in Hungary in the late seventies.
Relevant evidence: No