Question: John Mathieson, BSC is one of a group of film makers who emerged from the music video industry whose peers include the director of  a 2007 British romantic war drama that chronicles a crime and its consequences over the course of how many decades?
{'answer': 'six', 'supporting_facts': [['John Mathieson (cinematographer)', 0], ['John Mathieson (cinematographer)', 1], ['John Mathieson (cinematographer)', 2], ['John Mathieson (cinematographer)', 3], ['Atonement (film)', 1]]}