sentences:  The 1979 show "The Secret Policeman's Ball", organised by John Cleese and producers Martin Lewis & Peter Walker, led to greater participation by comedians and rock musicians in further benefit shows for Amnesty and other social and political causes.It also led to the series of benefit shows that are informally known as "The Secret Policeman's Balls".The 2006 show was coordinated by British comedian Eddie Izzard.