Complex sentence: In 2001, Hargrove left SeaWorld for a Supervisor position of killer whale training with Marineland in the south of France where he conditioned and performed in-water interactions (known as waterwork) with killer whales that had never before swam with trainers.
Split into simpler sentences: In 2001, Hargrove left SeaWorld for a Supervisor position of killer whale training with Marineland in the south of France. There he conditioned and performed in-water interactions (known as waterwork) with killer whales that had never before swam with trainers.