Complex sentence: Eon Productions had licensed the stunt, which had been designed by Raymond McHenry; the stunt was initially conceived at Cornell Aeronautical Laboratory (CAL) in Buffalo, New York as a test for their powerful vehicle simulation software.
Split into simpler sentences: Eon Productions had licensed the stunt, which had been designed by Raymond McHenry. It was initially conceived at Cornell Aeronautical Laboratory (CAL) in Buffalo, New York as a test for their vehicle simulation software.