Complex sentence: In October 1998, the Great Barrier Reef complex opened comprising a tropical touch pool, a live coral cave, coral atoll, two circular gateway displays and a massive Great Barrier Reef oceanarium.
Split into simpler sentences: In October 1998, the Great Barrier Reef complex opened. This complex comprises a tropical touch pool, a live coral cave, coral atoll, two circular gateway displays and a massive Great Barrier Reef oceanarium.