Complex sentence: A plane from reported carrying out an attack on a submarine a short time later, and "Alden" steamed to the scene; seeing oil still rising, she attacked, expending the rest of her depth charges in the tracks.
Split into simpler sentences: A plane from reported carrying out an attack on a submarine a short time later, and "Alden" steamed to the scene. Seeing oil still rising, she attacked, expending the rest of her depth charges in the tracks.