Complex sentence: The 2009--10 Sydney New Year's Eve Fireworks was the 15th New Year's Eve event in Sydney, currently taking place at Sydney Harbour on the evening of December 31,2009 and in the early hours of January 1,2010.
Split into simpler sentences: The 2009--10 Sydney New Year's Eve Fireworks was the 15th New Year's Eve event in Sydney. Iy took place at Sydney Harbour on the evening of December 31,2009 and in the early hours of January 1,2010.