Detailed Instructions: In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Q: Question: How many people lived in San Francisco the year Davis embarked on his journey to the city? Passage 1: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.
 Passage 2:There is archaeological evidence such as a blade implement and arrowheads to suggest habitation as early as the Mesolithic and Neolithic eras. The Bronze Age finds in the area have proved more numerous. They have included a set of ring ditches, a rapier and several spearheads. The village is also noteworthy as the site of a substantial Iron Age hillfort, alternatively known as a bertune, which would later be pronounced "Burton" in the Norman fashion (the name of the village until the early 14th-century). Excavated in 1950–1951, The discovery of Gaulish-made samian ware and a distinctive coin, along with coarse-gritted and medieval pottery, have led archaeologists to believe that the fort was occupied by Roman soldiers sometime after their invasion of Britain in 43 AD under Vespasian. Such was not uncommon in other hill forts of the Iron Age, with Maiden Castle and Hod Hill, both in the county of Dorset, later occupied by Romans as strategic military bases.
 Passage 3:The "square" is actually triangular in shape. Immediately to the north, the modern Saïd Business School of Oxford University dominates the square, established in 1996 on the site of the former Oxford Rewley Road railway station. To the east are Hythe Bridge Street (A4144) and Park End Street, both leading into central Oxford. Between them is the Royal Oxford Hotel. To the south, Hollybush Row and then Oxpens Road (A4144 road) act as an inner ring road leading to Abingdon Road, the main arterial road south out of the city. On the corner with Hollybush Row is the old Frank Cooper's jam factory. To the west, Botley Road (A420 road) leads out of the city centre, under a railway bridge just south of the main Oxford railway station, situated to the northwest.

A:
1