Complex sentence: Back home, they learn that Lucy has died from a mysterious illness stemming from severe blood loss as the result of repeated attacks by an unknown, blood-drinking animal;--the animal, they learn, was none other than Dracula taking a different shape.
Split into simpler sentences: Back home, they learn that Lucy has died from a mysterious illness stemming from severe blood loss as the result of repeated attacks by an unknown, blood-drinking animal. The animal, they learn, was none other than Dracula taking a different shape.