Complex sentence: The 2002 Atlantic hurricane season was a slightly below average Atlantic hurricane season, officially starting on June 1,2002 and ending on November 30, dates which conventionally limit the period of each year when most tropical cyclones develop in the Atlantic Ocean.
Split into simpler sentences: The 2002 Atlantic hurricane season was a slightly below average Atlantic hurricane season. It officially started on June 1,2002 and ended on November 30, dates which conventionally limit the period of each year when most tropical cyclones develop in the Atlantic Ocean.