sentences:  In a 1986 interview with "Rolling Stone" magazine, Bono explained that he was motivated to become involved in social and political causes by seeing one of the "Secret Policeman's Ball" benefit shows, staged by Monty Python member John Cleese and producer Martin Lewis for the human-rights organisation Amnesty International in 1979.Bono stated, "I saw "The Secret Policeman's Ball" and it became a part of me.It sowed a seed...".