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 "H. H. Asquith"): Herbert Henry Asquith, 1st Earl of Oxford and Asquith, (12 September 1852 – 15 February 1928), generally known as H. H. Asquith, served as the Liberal Prime Minister of the United Kingdom from 1908 to 1916, and was the last Liberal leader to lead that party in government without forming a coalition.
Relevant evidence: Yes