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: Which of the films that Ellenshaw produced visual effects for made the most at the box office? Passage 1:Harrison Ellenshaw (born Peter Ellenshaw, July 20, 1945 in Harrisburg, Pennsylvania) is an American matte painter, following his British-born father Peter Ellenshaw. He started his career at Walt Disney Studios. He later joined George Lucas's effects studio Industrial Light and Magic (ILM), where he produced many of the matte visual effects backgrounds for the films Star Wars (1977) and The Empire Strikes Back (1980). He then returned to Disney to work on the film Dick Tracy (1990), and eventually headed Disney Studio's effects department, Buena Vista Visual Effects (BVVE). He was also visual effects supervisor for Tron (1982), where he had the distinction of being the first person to have that credit in a film.
Passage 2:After finishing schooling, Carroll worked as a student lawyer for the law office of Brown and Brune in Baltimore. He was admitted to the bar in 1851. Carroll practiced law in Maryland from 1854 until 1858. He ran as a Howard County Democratic candidate for the state General Assembly in 1854, (shortly after the separation of the former Howard or Western District of Anne Arundel County and the "erection"/establishment of Howard as the 22nd of the state's 23 counties), however losing to his opponent from the newly-dominant "Know Nothing" Party (also known as the American Party) during the political crises of the 1850s. Carroll then moved to New York City and while there, accepted a position as deputy clerk and United States Commissioner in the office of the clerk of the United States District Court. He stayed there until 1861, at the outbreak of the Civil War, when he returned to Maryland, where he then remained the rest of his life. When he returned to Maryland, Carroll purchased the "Doughoregan Manor", historic family estate in Howard County, near Ellicott City from his older brother Charles Carroll.
Passage 3:In Roman times, it was a village in the province of Moesia, first mentioned in 169. After the decline of the Roman Empire, the town turned out to be located at the northern border of the Byzantine Empire. In 1059, it was named Nicopolis, Greek for "City of Victory". During most of the Middle Ages, it was part of the Bulgarian Empire from its foundation in 681. After the fall of Tarnovo in 1393, the last Bulgarian Tsar Ivan Shishman defended what remained of the Empire from the fortress of Nikopol, where he was captured after the town was conquered by the Ottomans in 1395. Nikopol is therefore sometimes considered the capital of Bulgaria during these two years. It was the site of the Battle of Nicopolis, the last large-scale crusade of the Middle Ages, in 1396. At the fortress of Nicopolis, the united armies of Christian Europe headed by Hungarian king Sigismund and various French knights were defeated by the Ottomans under Bayezid I and his Serbian vassal Stefan Lazarevic.

Output:
1