Complex sentence: As the founder and supporter of the Ratcliffe Aerodrome, Sir Lindsay Everard was a pioneer aviator, knighted for his crucial efforts in World War II with the Air Transport Auxiliary.
Split into simpler sentences: As the founder and supporter of the Ratcliffe Aerodrome, Sir Lindsay Everard was a pioneer aviator. He was knighted for his crucial efforts in World War II with the Air Transport Auxiliary.