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 "Women's Social and Political Union"): Its membership and policies were tightly controlled by Emmeline Pankhurst and her daughters Christabel and Sylvia (although Sylvia was eventually expelled).
Relevant evidence: Yes