Question: What documentary had music composed by the person who wrote "I'll Feel a Whole Lot Better"?
Sentence (from "Gene Clark"): He was the Byrds' principal songwriter between 1964 and early 1966, writing most of the band's best-known originals from this period, including "I'll Feel a Whole Lot Better", "She Don't Care About Time", and "Set You Free This Time".
Relevant evidence: Yes