Detailed Instructions: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Q: Passage: Lancaster was born in London in 1908, the only child of Robert Lancaster (1880–1917) and his wife, Clare Bracebridge, née Manger. His paternal grandfather, Sir William Lancaster, rose from modest beginnings to become the chief executive of the Prudential Assurance Company, Lord of the manor of East Winch, Norfolk, and a philanthropist in the field of education. Osbert's mother was an artist, known for her paintings of flowers, who had exhibited regularly at the Royal Academy; his father was a publisher, who volunteered for the army on the outbreak of the First World War, was commissioned as a second lieutenant in the Norfolk Regiment, and was killed at the Battle of Arras in April 1917.
Elgin Crescent, Notting Hill, where Lancaster was born and raised, was an upper-middle class area. The family maintained a staff of servants, including a cook and a nurse. Such was the mixed nature of London in the early years of the 20th century that a short distance away were the deprived and dangerous Notting Dale and the Portobello Road, where, as Lancaster recalled in his 1953 memoirs, it was said to be impossible for a well-dressed man to walk and emerge intact. From an early age Lancaster was aware of the variety of classes, nationalities, and social attitudes around him.In 1918 Lancaster was sent to St Ronan's preparatory school, Worthing. The régime at the school leaned heavily towards sport, in which he was neither interested nor proficient. The headmaster, Stanley Harris, was a celebrated amateur footballer and occasional first class cricketer, but he was reasonably tolerant of Lancaster's disdain for games, and on the whole Lancaster enjoyed his time at the school. His education there was, he later commented, of more importance to him than anything he learned later in his school and university career. He left St Ronan's in 1921, aged thirteen, and went to Charterhouse, where his father and uncles had all been sent. There he was shocked by the bullying and bad language, but in addition to its sporty, philistine "bloods", the school had an intellectual and aesthetic tradition. Lancaster's biographer Richard Boston writes, "The hearty Baden-Powell, for example, was offset by Ralph Vaughan Williams and Robert Graves, while talented Carthusian artists had included Thackeray, Leech, Lovat Fraser and Max Beerbohm". The art master, P. J. ("Purple") Johnson, encouraged Lancaster, insisting that a sound technique was a prerequisite for effective self-expression in drawing or painting; in that respect the boy's time at the school was valuable, though otherwise the headmaster found him "irretrievably gauche ... a sad disappointment". Lancaster shared Beerbohm's view that being an old boy of the school was more pleasurable than being a pupil there.
A:
What is the full name of the person married to the son of the man who rose to become chief executive of the Prudential Assurance Company?