The document provides a biography of John Lennon and details about his iconic song "Imagine". It discusses how Lennon was born in 1940s Liverpool and formed his first band in 1956. In the late 1960s and 1970s, while married to Yoko Ono, Lennon composed "Imagine" which became widely popular and regarded as an anthem of peace. The song encourages imagining a world without countries, wars, religions or property and promotes humanism.