Given the task definition and input, reply with output. 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.

Question: How much annual rainfall does the location where Eumenes established garrisons posts in the north get? Passage 1:In his will Johns Hopkins (1795-1873) left his summer home and estate, Clifton, then northeast of Baltimore, off the Harford Road, to the university for its new campus along with $7 million, split between the university and a hospital, also named for him. One of his provisions was that only interest obtained from his stock in the Baltimore and Ohio Railroad could be used to build facilities for the university. Unfortunately, after Johns Hopkins' death, the B&O Railroad fell into mismanagement; its eventual financial collapse was hastened by the Financial Panic and Recession of 1893 and the stock's value declined drastically. Therefore, the original campus of the university was established by first President Daniel Coit Gilman in downtown Baltimore along North Howard Street, between West Center, Little Ross, and West Monument Streets on the west side of the Mount Vernon-Belvedere neighborhood, where buildings were already available. However, this location did not permit room for growth and soon the trustees began to look for a place to move. Eventually, Hopkins would relocate to the former Homewood House and Estate of Charles Carroll, Jr. (son of Charles Carroll of Carrollton, 1737-1832) built 1801-1803, and the later Wyman Villa estate of JHU Board member William Wyman, built in the 1880s. Here JHU created the park-like main campus of Hopkins Homewood, set on 140 acres (0.57km) in what today lies between the north Baltimore neighborhoods of Charles Village (begun in the 1870s, and then known as Peabody Heights) to the east, the planned suburban-style communities of Guilford (established 1913) and Roland Park (established early 1890s) to the north, and to the west, the mill towns of Hampden-Woodberry along the Jones Falls stream valleys and tributary Stony Run through Wyman Park and the Wyman Park Dell.
Passage 2:Zeta Aurigae was first recognized as a spectroscopic binary by William Hammond Wright while analyzing photographic plates taken at Lick Observatory between 1898 and 1908. This star is among those earlier described by Antonia Maury as having a composite spectrum. The first orbit was determined in 1924 by William Edmund Harper using measurements taken at Dominion Observatory, his orbital elements are very similar to the most recent determinations. Harper also noticed that the composite nature of the spectrum had disappeared on the one plate when the K type primary was nearest the sun indicating a possible eclipse. In 1932 the eclipsing binary nature of the system was confirmed by Paul Guthnick, Heribert Schneller and independently Josef Hopmann.
Passage 3:Although nominally under Seleucid control, Pergamon under Philetaerus enjoyed considerable autonomy. However, upon his succession, Eumenes, perhaps with the encouragement of Ptolemy II, who was at war with the Seleucids, revolted, defeating the Seleucid king Antiochus I near the Lydian capital of Sardis in 261 BC. He was thus able to free Pergamon, and greatly increase the territories under his control. In his new possessions, he established garrison posts in the north at the foot of Mount Ida called Philetaireia after his adoptive father, and in the east, northeast of Thyatira near the sources of the river Lycus, called Attaleia after his grandfather, and he extended his control south of the river Caicus to the Gulf of Cyme as well. Demonstrating his independence, he began to strike coins with the portrait of Philetaerus, while his predecessor had still depicted Seleucus I Nicator.
3