Complex sentence: During the second World War there is a recorded incident of an RAF Lancaster getting shot down by the Swiss anti aircraft gunners and crashing into the mountain, the pilot of the aircraft was Horace Badge and all of the crew were lost.
Split into simpler sentences: During the Second World War, there is a recorded incident of a Lancaster of the Royal Air Force getting shot down by the Swiss anti-aircraft gunners and crashing into the mountain. The pilot of the aircraft was Horace Badge and all of the crew were lost.