In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.

Context: When the Countess von Gleichen's brother, Francis, inherited his cousin's Marquessate of Hertford in 1870 Link Information: Francis George Hugh Seymour, 5th Marquess of Hertford (11 February 1812 – 25 January 1884),  Answer: 58
At what age was the Countess von Gelichen's brother when he inherited his cousin's Marquesstate of Hertford in 1870?

Context: Mouat indicated that the oil was the product of a tree Chaulmoogra odorata, which had been described in 1815 by William Roxburgh, a surgeon and naturalist, while he was cataloging the plants in the East India Company’s Link Information: He studied medicine at Edinburgh University and matriculated around 1771 or 1772 Answer: Edinburgh University
Where was the surgeon and naturalist who described the Chaulmoogra odorata tree in 1815 educated?

Context: Jack Miller sailed from Norfolk, Virginia, 13 June 1944, Link Information: none Answer: none

What was the population of the city the Jack Miller set sail from at the time?