Complex sentence: During the First Free Practice session on Thursday morning Austrian driver Karl Wendlinger had a major accident in the Nouvelle Chicane, after hitting the wall at almost 280 km/h. Wendlinger was in a coma for several weeks and threatened his F1 career.
Split into simpler sentences: During the first free practice session on Thursday morning, Austrian driver Karl Wendlinger had a major accident at the Nouvelle Chicane, after hitting the wall at almost. The accident left Wendlinger in a coma for several weeks and threatened his F1 career.