Question: What is the cause of death of composer of song Imagine (John Lennon Song)?
Sentence (from "Imagine (John Lennon song)"): One month after the September release of the LP, Lennon released "Imagine" as a single in the United States; the song peaked at number three on the "Billboard" Hot 100 and the LP reached number one on the UK chart in November, later becoming the most commercially successful and critically acclaimed album of Lennon's solo career.
Relevant evidence: No