Complex sentence: She was sired by Dehere, the American Champion two-year-old colt of 1993 whose other progeny included Defier (George Main Stakes) and Graeme Hall (Jim Dandy Stakes).
Split into simpler sentences: She was sired by Dehere, the American Champion two-year-old colt of 1993. His other progeny included Defier (George Main Stakes) and Graeme Hall (Jim Dandy Stakes).