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.
Input: Question: Is the Washington Aqueduct still in use today? Passage 1: the 1840s and 1850s the largest cities in the U.S. built pipelines to supply drinking water from rivers or lakes. However, the drinking water was initially not treated, since the link between waterborne pathogens and diseases was not yet well known. In 1842 New York City was one of the first cities in the U.S. to tap water resources outside the city limits. It dammed the Croton River in Westchester County, New York, and built an aqueduct from the reservoir to the city. Also in 1842, construction was completed on Chicago's first water works, with water mains made of cedar and a water intake located about into Lake Michigan. In 1848, Boston began construction of a water transmission system. A tributary of the Sudbury River was impounded creating Lake Cochituate, from where the Cochituate Aqueduct transported water to the Brookline Reservoir that fed the city's distribution system. In 1853 Washington, D.C. followed suit by beginning the construction of the Washington Aqueduct to provide water from the Great Falls on the Potomac River.
Passage 2:In the Seven Years' War, he served as adjutant in the staff of Duke Ferdinand of Brunswick and on 1 August 1759 was wounded at Minden. On 14 October 1760 he commanded a Light Company at the Battle of Campen, where he was again wounded. One year later, as Lt. Colonel of the 98th Foot, he participated in the Capture of Belle Ile, off the coast of Brittany. Next, he served at the Battle of Havana in 1762. Later, he was on the staff of Wilhelm, Count of Schaumburg-Lippe during the Spanish invasion of Portugal (1762). In 1763 he retired on half-pay, but in 1772 he received a promotion to Colonel and served as aide-de-camp to King George III.
Passage 3:Down the coast of Africa: The Portuguese reached the westernmost point of Africa in 1444 and in 1458 rounded Cape Palmas where the coast tends eastward. Here the trade winds gave out and they faced the irregular winds near the doldrums and the east-flowing Guinea Current. In 1471 they reached the Gold coast where they found the gold that had previously come by caravan across the Sahara. In 1474 Lopes Goncalves reached the point where the coast turns south and became the first European sailor to cross the equator. In 1475-79 Spain and Portugal fought along the coast. The Treaty of Alcacovas gave the whole area to the Portuguese except for the Canaries. This was the first colonial war and the first colonial treaty. In 1482 Diogo Cao continued south against the Benguela current and the southeast trade winds, reaching the Congo River in 1482 and Cape Cross in Namibia in 1485. In 1487 Bartolomeu Dias reached Cape Voltas near the mouth of the Orange River and stood out to sea. Although the sources are not clear, he may have guessed that there were southern westerlies and was trying a volta do mar. After many days, at about 40 degrees south he discovered the westerlies and turned east. Finding no land after a number of days he turned north and reached Mossel Bay about 400km east of Cape Town. He continued east against the Agulhas current to Algoa Bay where the coast began to turn north. Guessing that he had found the route to India, he turned back, discovered and rounded the Cape of Good Hope and reached Lisbon in 1488. In 1493 Columbus arrived at Lisbon with news of the new world and reported that he had sailed out of sight of land for five weeks.

Output:
1