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.
One 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,
.
Solution is here: a
Explanation: The passage describes the 704th's actions during Operation Market Garden so only information about the operation is needed.

Now, solve this: Question: Which of the rivers along which Stephen traveled in 1376 has the widest point? Passage:Stephen was probably from the town of Ustiug. According to a church tradition, his mother was a Komi woman and his father was a Russian man. Stephen took his monastic vows in Rostov, where he learned Greek and learned his trade as a copyist. In 1376, he voyaged to lands along the Vychegda and Vym rivers, and it was then that he engaged in the conversion of the Zyriane (Komi peoples). Rather than imposing the Latin or Church Slavonic on the indigenous pagan populace, as all the contemporary missionaries did, Stephen learnt their language and traditions and worked out a distinct writing system for their use, creating the second oldest writing system for a Uralic language. Although his destruction of pagan idols (e.g., holy birches) earned him the wrath of some Permians, Pimen, the Metropolitan of All Rus', created him as the first bishop of Perm'. 

Solution:
a