Question: Who was Britain's oldest Prime Minister and lived in the Seaforth House built for his father? 
Sentence (from "William Ewart Gladstone"): In a career lasting over 60 years, he served as Prime Minister four separate times (1868–74, 1880–85, February–July 1886 and 1892–94), more than any other person, and served as Chancellor of the Exchequer four times.
Relevant evidence: No