Complex sentence: The lock is located in the River Lee Country Park which is part of the Lee Valley Park and stands close to the Showground site now known as the Broxbourne White Water Canoe Centre-venue of the 2012 Olympics canoeing event.
Split into simpler sentences: The lock is located in the River Lee Country Park which is part of the Lee Valley Park. Standing close to the Showground site-venue of the 2012 Olympics canoeing event.