instruction:
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.
question:
Context: the last Bulgarian Tsar Ivan Shishman Link Information: 

Ivan Shishman () ruled as emperor (tsar) of Bulgaria in Tarnovo from 1371 to 3 June 1395. Answer: 24
answer:
How long did the last Bulgarian Tsar rule the Empire?


question:
Context: and great-grandson of Revolutionary War general James Kenan Link Information: James Kenan was born on September 23, 1740 at the family plantation, The Lilacs, in Turkey, Sampson County, North Carolina.  Answer: North Carolina
answer:
Where was Thomas Kenan's great grandfather born?


question:
Context: Shaw was born on 13 July 1930 Link Information: none Answer: none
answer:

What was the population of Epsom the year Shaw was born?