Complex sentence: Wilfred Bourque, driving in a Knox, suffered a suspected rear-axle failure resulting his his car flipping end over end on the front stretch before crashing into a fence post, both he and his mechanic, Harry Halcomb, died at the scene.
Split into simpler sentences: Wilfred Bourque, driving in a Knox, suffered a suspected rear-axle failure resulting in his car flipping end over end on the front stretch before crashing into a fence post. Both he and his mechanic, Harry Halcomb, died at the scene.