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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Example solution: a
Example explanation: The passage describes the 704th's actions during Operation Market Garden so only information about the operation is needed.

Problem: Question: How many people lived in San Francisco the year Davis embarked on his journey to the city? Passage:Davis sailed for San Francisco, California, around Cape Horn in 1852, and upon arriving, engaged for a brief time as a gold miner, a lumber supercargo surveyor for a coastal steamer, and a purser for the Pacific Mail Steamship Company. In addition he helped found the Mercantile Library Association of California (its oldest public library). Under his administrative tutelage interest in the library was restored with his creation of a library catalog (an act which later lead to his poor eyesight). He resigned in 1855 and relocated to San Francisco in 1860 at which time he established the highly successful Golden Gate Flouring Mills and the Sperry Flour Company. He was elected a member of the American Antiquarian Society in 1862. When the American Civil War broke out, he served in the secretive San Francisco-based Home Guard acting to secure both the loyalty of California to then Union President Abraham Lincoln and the election of Leland Stanford as governor of California (by patrolling the polls on election day). He presided over the Produce Exchange of San Francisco from 1867 to 1877 until he was elected as a Republican to the United States House of Representatives of the Forty-fifth and Forty-sixth Congresses (March 4, 1877 - March 3, 1881), where on June 8, 1878 he spoke in support of a bill to restrict Chinese immigration. He was an unsuccessful candidate for reelection in 1880 to the Forty-seventh Congress.


Solution: b