Question: When was Dorothy Bentinck, Duchess Of Portland's husband born?
Sentence (from "Dorothy Bentinck, Duchess of Portland"): Dorothy Bentinck, Duchess of Portland ("née" Lady Dorothy Cavendish; 27 August 1750 – 3 June 1794) was Duchess of Portland as wife of William Cavendish-Bentinck, 3rd Duke of Portland, the Prime Minister of Great Britain.
Relevant evidence: Yes