Question: in what position did Mark Beresford Russell Grant-Sturgis serve under the person who would later be the prime minister of the united kingdom?
Sentence (from "Mark Beresford Russell Grant-Sturgis"): The son of Julian Sturgis and Mary Maud Sturgis "née" Beresford, he was educated at Eton College before becoming assistant private secretary to then chancellor of the exchequer, H. H. Asquith.
Relevant evidence: Yes