Question: Herb Metoyer is a Detroit-based singer-songwriter and novelist, best known for his folk music , he was an early mentor to, and lifelong influence on, Mike Taylor, who performed extensively with Henry John Deutschendorf Jr., an American singer-songwriter, record producer, actor, activist, and humanitarian, whose greatest commercial success was as a solo singer, known professionally as John Denver, died on which date?
Sentence (from "John Denver"): Starting in the 1970s, he was one of the most popular acoustic artists of the decade and one of its best-selling artists.
Relevant evidence: No