Question: When did J. C. C. Davidson's wife die?
Sentence (from "Frances Davidson, Viscountess Davidson"): Frances Joan Davidson, Viscountess Davidson, Baroness Northchurch, (née Dickinson; 29 May 1894 – 25 November 1985), styled Lady Davidson between 1935 and 1937 and as Viscountess Davidson between 1937 and 1985, was a British Conservative Party politician.
Relevant evidence: Yes