Question: What was the birthday of the man who Don Melnick's position is named after?
Sentence (from "Marjory LeBreton"): She worked with four leaders of the Progressive Conservative Party of Canada - John Diefenbaker, Robert Stanfield, Joe Clark and Brian Mulroney - from 1962 to 1993 before being appointed to the Senate on the advice of Mulroney.
Relevant evidence: No