Question: What was the name of a thoroughbred racehorse that won the 1889 Epsom Oaks and was owned by the Earl of Dunraven and Lord Randolph Churchill, a man who created the National Union of the Conservative Party?
Sentence (from "Lord Randolph Churchill"): His most acerbic critics resided in his own party among his closest friends; but his disloyalty to Lord Salisbury was the beginning of the end of what should have been a glittering career.
Relevant evidence: No