Question: What 1974 television special was a prequel to a 1978 television animated special, in which the 1978 special used the vocal talents of one of the members of "The Blues Brothers"
Sentence (from "David Denny (musician)"): While running a Mission District studio during the late 1980s, Denny contributed his guitar and vocal talents as a founding member of the Bombay Crawlers and played several Bay Area gigs with the swampy, powerful rock ensemble.
Relevant evidence: No