21) In what year did John Lennon release his solo single 'Instant Karma'?
22) What is the name of the song that John wrote for Yoko Ono in 1970?
23) In which city did John and Yoko open their One to One charity performance in 1972?
24) What is the name of the song written by John Lennon about his mother's death?
25) During which decade did The Beatles form?