Q: 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: Why would the pulmonary valve be used as an outflow valve? Passage 1:Burnside's professional career began in 1949 (he attended Dartmouth during his offseasons) and was interrupted by United States Army service in 1953. A stellar 1955 season in the Double-A Texas League, where he posted an 18–11 record and 2.47 earned run average for the Dallas Eagles, earned him his first big-league call-up to the New York Giants. He started two late-season games. In his first, on September 20, he issued six bases on balls and allowed seven runs (only two of them earned) in 3 innings against the cellar-dwelling Pittsburgh Pirates. While the Giants' offense bailed him out—Burnside departed the game with New York leading 11–7—his early exit kept him from claiming the victory in an eventual 14–8 Giants' triumph; that went to relief ace Hoyt Wilhelm. In his second start a week later, however, Burnside threw a complete game, seven-hit victory over the Philadelphia Phillies.
 Passage 2:The Yasui procedure is a pediatric heart operation used to bypass the left ventricular outflow tract (LVOT) that combines the aortic repair of the Norwood procedure and a shunt similar to that used in the Rastelli procedure in a single operation. It is used to repair defects that result in the physiology of hypoplastic left heart syndrome even though both ventricles are functioning normally. These defects are common in DiGeorge syndrome and include interrupted aortic arch and LVOT obstruction (IAA/LVOTO); aortic atresia-severe stenosis with ventricular septal defect (AA/VSD); and aortic atresia with interrupted aortic arch and aortopulmonary window. This procedure allows the surgeon to keep the left ventricle connected to the systemic circulation while using the pulmonary valve as its outflow valve, by connecting them through the ventricular septal defect. The Yasui procedure includes a modified Damus–Kaye–Stansel procedure to connect the aortic and pulmonary roots, allowing the coronary arteries to remain perfused. It was first described in 1987.
 Passage 3:Thomas Hart Taylor (July 31, 1825 – April 12, 1901) was a Confederate States Army colonel, brigade commander, provost marshal and last Confederate post commander at Mobile, Alabama during the American Civil War. His appointment as a brigadier general was refused by the Confederate Senate after Confederate President Jefferson Davis failed to nominate Taylor, apparently following Davis's appointment of Taylor to the rank. Nonetheless, Taylor's name is frequently found on lists and in sketches of Confederate generals. He was often referred to as a general both during the Civil War and the years following it. Before the Civil War, Taylor served as a first lieutenant in the 3rd Kentucky Volunteer Infantry Regiment during the Mexican–American War. After that war, he was a cattle driver, farmer and lawyer. After the Civil War, he was engaged in business in Mobile, Alabama for five years, and after returning to Kentucky, was a Deputy U.S. Marshal for five years and was chief of police at Louisville, Kentucky for eleven years.

A:
2