Question: Which party did the English Prime Minister and subject of Barbara Learning lead from 1940 to 1955?
Sentence (from "Barbara Leaming"): Barbara Leaming is a bestselling American biographer, whose subjects have included Roman Polanski, Orson Welles, Rita Hayworth, Marilyn Monroe, John F. Kennedy, Winston Churchill, and Jacqueline Kennedy Onassis.
Relevant evidence: Yes