Question: What nationality is the performer of song The Ballad Of Boot Hill?
Sentence (from "Johnny Cash"): Cash was known for his deep, calm bass-baritone voice, the distinctive sound of his Tennessee Three backing band characterized by train-like chugging guitar rhythms, a rebelliousness coupled with an increasingly somber and humble demeanor, free prison concerts, and a trademark, all-black stage wardrobe, which earned him the nickname "The Man in Black".
Relevant evidence: No