Complex sentence: As Remsburg was checking whether Kingston was still conscious, the Condor Security, Wink Vavasseur's personal security force, entered the arena, removed both competitors and the referee from the ring and began taking the set down.
Split into simpler sentences: As Remsburg was checking whether Kingston was still conscious, the Condor Security entered the arena. The Condor Security removed both competitors and the referee from the ring and then began taking the set down.