Question: What year was the former Prime Minister, in which Edward Llewellyn, Baron Llewellyn of Steep was the Downing Chief of Staff under, born?
Sentence (from "Edward Llewellyn, Baron Llewellyn of Steep"): Edward David Gerard Llewellyn, Baron Llewellyn of Steep, {'1': ", '2': ", '3': ", '4': "} (born 23 September 1965) is Her Majesty's Ambassador to France.
Relevant evidence: Yes