Complex sentence: The tour was originally conceived by the Executive Director of Amnesty International's U.S. section, Jack Healey and producer Martin Lewis, who had first recruited rock musicians to work with Amnesty years before for The Secret Policeman's Balls series of benefits.
Split into simpler sentences: The tour was conceived by the Executive Director of Amnesty International's U.S. section, Jack Healey. Producer Martin Lewis had first recruited rock musicians to work with Amnesty years before for The Secret Policeman's Balls series of benefits.