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-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,
.
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: Who signed the Treaty of Gulistan to end the Russo-Persian War? Passage:When the Qajars had succeeded in restoring the unity of Persia, the sons of the Khan were no more able to maintain their independence like the other Caucasian chiefs and had to choose between Russia and Persia. The Khan of Shirwan, Mustafa, who had already entered into negotiations with Zubov, submitted to the Russians in 1805, who occupied the Persian cities of Derbend and Baku the next year (1806) during the Russo-Persian War (1804-1813), but soon afterwards he made overtures to the Persians and sought help from them. By the Treaty of Gulistan (12/24 October 1813) following the end of the 1804-1813 war, Persia was forced to cede its territories and regions comprising Darband, Quba, Shirwan and Baku, while giving up all claims on them as well. Nevertheless, Mustafa continued to have secret dealings with Persia. It was not until 1820 that his territory was occupied by Russian troops; the Khan fled to Persia and Shemakha was irrevocably incorporated in Russian territory. Iranian anger while being dissatisfied with losing swaths of its integral territories in the North and South Caucasus subsequently sparked the Russo-Persian War (1826-1828), which resulted in another Iranian loss, as well as the ceding of its last remaining territories in the Caucasus comprising what is now Armenia, and southern parts of the contemporary Republic of Azerbaijan. The Treaty of Turkmenchay of 1828 officially ratified the forced ceding of these Iranian territories to Imperial Russia, while it would also mark the official end of millennia long intertwined Iranian hegemony, rule, and influence over the Caucasus region, including Shirvan.

Solution:
b