Complex sentence: The 1839 Grand Liverpool Steeplechase was the first official annual running of a Handicap Steeple-chase, later to become known as the Grand National Steeplechase Horse race which took place at Aintree Racecourse near Liverpool on February 26,1839 and attracted a field of seventeen runners.
Split into simpler sentences: The 1839 Grand Liverpool Steeplechase was the first official annual running of a steeplechase which later became known as the Grand National. It was held at Aintree Racecourse near Liverpool, England, on 26 February 1839 and attracted a field of seventeen runners.