Question: In which year was this American country singer-songwriter inducted into the Country Music Hall of Fame, who began his solo career in 1971 and recorded the song 'Listen to the Radio', a title track for one of his albums?
Sentence (from "Don Williams"): His straightforward yet smooth bass-baritone voice, soft tones, and imposing build earned him the nickname: "Gentle Giant" of country music.
Relevant evidence: No