Complex sentence: Scarfiotti wrecked his Porsche 910 on during trials when the car veered abruptly off the Rossfeldstrasse track and catapulted ten yards down a tree-covered slope.
Split into simpler sentences: Scarfiotti wrecked his Porsche 910 on the Rossfeldstrasse track. The car veered abruptly and catapulted ten yards down a tree-covered slope.