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 input: 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-Lo 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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Example output: a
Example explanation: The passage describes the 704th's actions during Operation Market Garden so only information about the operation is needed.
Q: Question: How many days after he broke his leg did Port Vale defeat the Bristol Rovers? Passage:He joined Third Division club Port Vale in October 1987, manager John Rudge splashing out 20,000. Scoring on his debut at Vale Park in a 21 win over Bristol Rovers on 19 October, he was soon a big hit, becoming the club's joint-top scorer in the 198788 season with 10 goals (along with Darren Beckford). He played 48 league and cup games in 198889 but broke his leg in a 11 draw at Bolton Wanderers on 25 April 1989, and so missed out on the play-off final victory over Bristol Rovers. He managed to recover, but did not re-capture his first team position and in March 1990 was loaned back to Peterborough United, who were then under Mark Lawrenson's stewardship; Peterborough paid 40,000 for his services on a permanent basis the next month.

A:
b