Question: When did Marjorie Sinclair, Baroness Pentland's mother die?
Sentence (from "Marjorie Sinclair, Baroness Pentland"): She was interested in Canadian history, and assisted her parents and took part in the "Tableaux Historiques" given by them in Montreal, Quebec the historical fancy dress ball given at Ottawa, Ontario and the Victorian Era ball given at Toronto, Ontario.
Relevant evidence: No