Complex sentence: Hurricane Edith was the strongest hurricane to form during the 1971 Atlantic hurricane season and the southernmost landfalling Category 5 hurricane on record in the Atlantic until surpassed by Hurricane Felix of 2007.
Split into simpler sentences: Hurricane Edith was the strongest hurricane to form during the 1971 Atlantic hurricane season. It was also the southernmost landfalling Category 5 hurricane on record in the Atlantic until surpassed by Hurricane Felix of 2007.