Complex sentence: On 6 September, the Italian submarine "Guglielmo Marconi" waited for prey south of the Farasan Islands but succeeded in torpedoing and sinking only one ship, the oil tanker "Atlas".
Split into simpler sentences: On 6 September, the Italian submarine "Guglielmo Marconi" waited for prey south of the Farasan Islands. The "Guglielmo Marconi" succeeded in torpedoing and sinking only one ship, the oil tanker "Atlas".