Given the task definition, example input & output, solve the new input case.
In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Example: Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lô during July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
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Output: a
The passage describes the 704th's actions during Operation Market Garden so only information about the operation is needed.

New input case for you: Question: How long after the construction of Great Harrowden was it given to Ralph Hastings? Passage:During the Wars of the Roses, Ralph Hastings was a committed supporter of the House of York. He was both an esquire and a knight of the body to Edward IV. He fought at the battles of Barnet on 14 April 1471 and at Tewkesbury on 4 May 1461, where he was knighted. In the same year the King appointed him joint keeper of Rockingham Castle in Kent, and granted him an annuity of 50 marks. In 1462 he was granted the manor of Great Harrowden, forfeited to the crown by the attainder on 4 November 1461 of Sir William Vaux, later slain at Tewkesbury. He held numerous offices during the reign of Edward IV, including Keeper of the Lions and Leopards in the Tower of London.

Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
a