Complex sentence: Following a demonstration of its ability to break the sound barrier in low level flight, the aircraft disintegrated, killing 31 people, including the crew of two, test pilot and record breaker John Derry and Tony Richards.
Split into simpler sentences: Following a demonstration of its ability to break the sound barrier during a low level flight, the aircraft disintegrated. The debris of the aircraft landed upon spectators; the accident killed a total of 31 people, including the crew of two, test pilot and record breaker John Derry and Tony Richards.