 Complete the following phrase:  After the disappointment of Rio, Schippers decided to change. She parted with Bart Bennema as her coach, who had overseen her transition from a outstanding heptathlete, winning bronze in the IAAF World Championships Moscow 2013, into a successful 100m and 200m sprinter. Both felt that she had to try a different approach to progress, and so she decided join U.S. coach and sprint guru Rana Reider and focus on the 2017 World Championships in Athletics in London, to defend her world title in the 