Question: What is the birthdate of this British political activist and leader of the British suffragette movement who helped women win the right to vote and who tightly controlled the membership and policies of Women's Social and Political Union?
Sentence (from "Mabel Capper"): Mabel Henrietta Capper (23 June 1888 – 1 September 1966) was a British suffragette.
Relevant evidence: No