Question: What British Politician, who was the Prime Minister of the Unted Kingdom, was the person who forced a resignation from PAtrick Mercer?
Sentence (from "James Callaghan"): Leonard James Callaghan, Baron Callaghan of Cardiff, {'1': ", '2': ", '3': ", '4': "} (27 March 1912 – 26 March 2005), often known as Jim Callaghan, was a British politician who served as Prime Minister of the United Kingdom from 1976 to 1979 and Leader of the Labour Party from 1976 to 1980.
Relevant evidence: No