Question: When did Marjorie Sinclair, Baroness Pentland's mother die?
Sentence (from "Ishbel Hamilton-Gordon, Marchioness of Aberdeen and Temair"): Ishbel Maria Hamilton-Gordon, Marchioness of Aberdeen and Temair, GBE ("née" Isabel Maria Marjoribanks; 15 March 1857 – 18 April 1939) was a British author, philanthropist, and an advocate of woman's interests.
Relevant evidence: Yes