Question: Who wrote the folk song recorded by an English rock band that released it's debut album in the United States on January 12, 1969?
Sentence (from "Babe I'm Gonna Leave You"): It was recorded by Joan Baez (credited and became widely popular as "traditional") and released on her 1962 album "Joan Baez in Concert, Part 1"; and by the English rock band Led Zeppelin, who included it on their 1969 debut album "Led Zeppelin".
Relevant evidence: Yes