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: In what year was the Civil War Unknowns Monument built? Passage 1:Hungary competed in its first Davis Cup in 1924 and was stuck in the first round for five years (not counting an automatic bye). They broke the curse with the first and convincing 5–0 win against Norway realized by Béla Von Kehrling in the major part. In 1929 they cruised to their first semifinal losing to Great Britain in a close 3–2 (two singles absolved by Von Kehrling) falling only in the fifth rubber. It took another 20 years to relive the success in 1949 (including the five-year vacancy period during the Second World War) this time losing to France in the semis. The core of the team was 1947 French Open champion József Asbóth. In 1956 Hungary was absent from the Cup because of the Hungarian Revolution of 1956. In 1966 a record attendance visited the Hungary-Great Britain quarterfinal in Budapest, where a crowd of 20,000 spectators supported the András Szikszay-István Gulyás Davis Cup team during the four-day tie. A tough weekend started on Saturday 14 May for the multiple champions Brits, who had three-time Major semifinalist Mike Sangster losing their first match in five sets to István Gulyás. They turned to 2–1 on the same day but on Sunday András Szikszay also defeated Sangster leaving the decision to the fifth final tie, which was postponed to Monday. In a four set match Gulyás started well taking the first one 18–16, but Roger Taylor finished in three easier sets. English team captain Headley Baxter remarked that although they won they hadn't been forced into such a tough fight for years. Just two weeks later Gulyás had his first and lone Grand Slam final in the French Open losing only to Tony Roche of Australia.
 Passage 2:The establishment of Decoration Day as an official government holiday (by proclamation, not by law) swiftly occurred, and the holiday was almost immediately a popular one. At Arlington cemetery, the number of people attending the annual event swiftly overwhelmed the limited facilities. The first Decoration Day event was held in front of Arlington House. James A. Garfield, a former Major General in the Union Army (and future President of the United States), addressed a "large crowd" from the mansion's back steps. The following year, President Ulysses S. Grant closed the federal government for the holiday, and most businesses followed, which greatly contributed to attendance at the cemetery. A dais seating 400 people was erected in what remained of "the Grove" at the rear of Arlington House to accommodate speakers and dignitaries—which, for the first time, included President Grant. The Civil War Unknowns Monument, which was located south-southwest of Arlington House, was covered by a canopy. Several American flags hung from the canopy, red-white-and-blue bunting was draped along the monument's top, and numerous floral tributes were laid against it. An estimated 25,000 people attended the event throughout the day. Two sites for ceremonies were used in 1870. A very large speakers' dais was erected near the Sheridan Gate and McClellan Gate on the cemetery's east side, and used for speeches throughout the day. For the more important speakers, a second dais seating 200 was erected at the rear of Arlington House (although not with "the Grove"). A stand, permitting the seating of 500, was built nearby for a grand chorus (which sang for the crowd). Again, the Civil War Unknowns Monument was canopied and decorated. About 20,000 people attended the event that year, with rain keeping the numbers low. In 1871, the speakers' dais moved back to "the Grove" and expanded to accommodate 300 people. Frederick Douglass, the former African American slave and abolitionist, was the featured speaker that year. "Hundreds" of people attended his address, including President Grant. The dais moved again in 1872, this time to a location a few yards to the south of the Civil War Unknowns Monument. The dais was slightly reduced in size so that it only sat 200, but it now included a thrust on which stood a speaker's podium. More than 5,000 people attended the 1872 event.
 Passage 3:On 11 November, Diversity conducted several hours of signing autographs and posing for photographs with thousands of fans at The Galleria Shopping Centre in Hatfield, Hertfordshire. Afterwards, they hosted a prize-giving ceremony on stage and performed their "Michael Jackson" dance routine. They performed another Michael Jackson tribute at the MOBO award ceremony. Diversity "launched" Christmas at Lakeside on 1 November, where they took two members of the audience on-stage for a dance-off. There was a competition held in November, and a hundred people won a meet and greet with Diversity on 19 November at The Glades in Bromley. On 7 December, Diversity performed on the Royal Variety Performance, hosted in Blackpool and shown on ITV across the UK on 16 December. On the show Got to Dance Warm Up, they presented their Westfield Shopping Centre FlashMob, sponsored by T-Mobile.
2