Complex sentence: The 1883 eruption was one of the deadliest and most destructive volcanic events in recorded history, as nearly 40,000 deaths being attributed to the eruption itself and the tsunamis it created.
Split into simpler sentences: The 1883 eruption was one of the deadliest and most destructive volcanic events in recorded history. Nearly 40,000 deaths are attributed to the eruption itself and the tsunamis it created.