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: he became the first to isolate the measles virus from the brain of a child who had died from measles encephalitis. Link Information: none Answer: none
Which disease shows symptoms sooner after infection, the measles encephalitis virus or the virus Hodes discovered in Guam that was spread by mosquitoes?

Context: Warrington spent most of his career on the Texas frontier and served under Colonel Ranald S. Mackenzie during the Texas-Indian Wars of the 1870s. Link Information: On February 25, 1871, he assumed command of the 4th U.S. Cavalry at Fort Richardson in Jacksboro, Texas. Answer: the 4th U.S. Cavalry
What units did the Colonel Warrington served under inn the Texas-Indian Wars command?

Context: in 1901, including property in Marylebone, London and earned the title of 'Britain's wealthiest bachelor'. Link Information: none Answer: none

What population did Essex have the year Scott-Ellis earned the title of "Britain's wealthiest bachelor"?