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: 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
How long did the last Bulgarian Tsar rule the Empire?

Context: 1981 Finals MVP Cedric Maxwell Link Information: none Answer: none
Was the 1981 Finals MVP born in California?

Context: through the Crescent neighborhood, past the site of the historic Link Information: Crescent Elementary School was built in 1930 Answer: 1930

When was the school located in the Crescent neighborhood built?