Question: What is the date of death of Harriet Pelham-Holles, Duchess Of Newcastle-Upon-Tyne's husband?
Sentence (from "Harriet Pelham-Holles, Duchess of Newcastle-upon-Tyne"): the wife of the British statesman and Prime Minister Thomas Pelham-Holles, 1st Duke of Newcastle-upon-Tyne.
Relevant evidence: Yes