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.

[Q]: Context: . Real executive power vests in a Union Council of Ministers Link Information: none Answer: none
[A]: How many members comprise the council in which real executive power is vested?


[Q]: Context: Ross became an assistant professor at St. Louis University in 1935 Link Information: Eric Temple Bell (February 7, 1883 – December 21, 1960)  Answer: 52
[A]: How old was Eric Temple Bell when Ross was an assistant professor at St. Louis University?


[Q]: Context: He was appointed a brevet lieutenant colonel, and then colonel for gallantry in the Link Information: The Battle of Fort Stedman, also known as the Battle of Hare's Hill, was fought on March 25, 1865, during the final weeks of the American Civil War.  Answer: 1
[A]:
How long did the battle where George was appointed colonel for last?