Question: That's All Right had a B-side that was a cover of the song written in 1946 by which Bluegrass legend?
Sentence (from "Mrs. Washington"): The April 1994 7" single (catalog number: blaze68) and CD single (catalog number: blaze68cd) include a cover of "Ask", a 1986 single by the Smiths that later appeared on their 1987 albums, "Louder Than Bombs" (US) and "The World Won't Listen" (UK).
Relevant evidence: No