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: currently is the offensive coordinator and running backs coach at San Diego State University. He was the interim head coach at the University of Minnesota, Link Information: orton previously served as the head coach at the University of Nevada, Reno in 1993 and at the University of Nevada, Las Vegas Answer: University of Minnesota
Which is the oldest university that Jeff Horton has coached at?

Context: a group of gunboats from the Confederate States Navy Link Information: a group of gunboats from the Confederate States Navy, Answer: 1
How many gunboats did the Confederate States Navy have?

Context: from across the region harried the British troops on their return to Boston, culminating in the Siege of Boston and the outbreak of the war. Link Information: The Siege of Boston (April 19, 1775 – March 17, 1776)  Answer: 1

How long did the Siege of Boston last?