Question: What is the date of death of Isabel Neville, Duchess Of Clarence's father?
Sentence (from "Richard Neville, 16th Earl of Warwick"): Richard Neville, 16th Earl of Warwick (22 November 1428 – 14 April 1471), known as Warwick the Kingmaker, was an English nobleman, administrator, and military commander.
Relevant evidence: Yes