Complex sentence: Subsequently, only Klishina was cleared by the IOC for participation at the 2016 Olympics, with the IOC still deciding on the case of Stepanova, the whistleblower behind the scandal who is currently living in hiding in the United States.
Split into simpler sentences: Subsequently, only Klishina was cleared by the IOC for participation at the 2016 Olympics. Stepanova is the whistleblower behind the scandal who is currently living in hiding in the United States.