Complex sentence: The 1992 Cageless shark-diving expedition was the world ′ s first cageless dive with great white sharks and contributed hugely to changing public opinions about the supposed ferocity of these animals.
Split into simpler sentences: The 1992 Cageless shark-diving expedition was the world ′ s first cageless dive with great white sharks. It contributed to changing public opinions about the supposed ferocity of these animals.