Complex sentence: At three, he won the San Felipe Stakes and the Santa Anita Derby; he also won a race at Keeneland Race Course by 6½ lengths in track-record time, beating Flamingo Stakes winner Oil Capitol and Blue Grass Stakes winner Mr. Trouble.
Split into simpler sentences: At three, he won the San Felipe Stakes and the Santa Anita Derby. He also took a race at Keeneland Race Course by six and a half lengths in a new track record, beating Flamingo Stakes winner Oil Capitol, and the winner of the Blue Grass Stakes, Mr. Trouble.