Complex sentence: She won the CCI four star Badminton Horse Trials in 1992 and 2000, the CCI four star Burghley Horse Trials in 1996, and the CCI four star Rolex Kentucky with her homebred mare King`s Temptress in 2011.
Split into simpler sentences: She won the CCI four star Badminton Horse Trials in 1992 & 2000, and the CCI four star Burghley Horse Trials in 1996. Mary then won the CCI four star Rolex Kentucky with her homebred mare King`s Temptress in 2011.