Complex sentence: In 1938, at the age of 13, La Troienne was frightened by a thunderstorm and due to a loss of vision in her right eye, she bolted and collided with a tree.
Split into simpler sentences: In 1938, at the age of 13, La Troienne was frightened by a thunderstorm. Half blind due to a loss of vision in her right eye, she spooked and collided with a tree.