Question: The best selling single of John Lennon's solo career was used as a teference by who to erect a memorial?
Sentence (from "Imagine Peace Tower"): The Imagine Peace Tower (Icelandic: "Friðarsúlan" , meaning "the peace column") is a memorial to John Lennon from his widow, Yoko Ono, located on Viðey Island in Kollafjörður Bay near Reykjavík, Iceland.
Relevant evidence: Yes