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: When was the end of the dynasty  which Chang'an served as capital? Passage 1:Summerfield was born in Ivybridge, Devon and joined the Plymouth Argyle Centre of Excellence aged 10. He made his first-team debut in the last match of the 2004–05 season, a 0–0 home draw with Leicester City on 8 May 2005, entering the match as a 77th minute substitute for David Worrell. He signed a two-year professional contract with Plymouth on 1 August 2005, before the start of 2005–06. He made two appearances in his first two seasons for Argyle (both as a substitute), once in the league and once in the League Cup. Summerfield made his debut for Argyle, as a substitute, on 8 May 2005, against Leicester City. On his first start for Argyle, against Colchester United in the Championship, on 8 August 2006, during 2006–07, Summerfield scored with a long-range volley. In January 2007, Summerfield was listed at number five in The Guardian's ten best prospects to watch out for in 2007.
 Passage 2:In March and April 1864, Shelby's men harassed and skirmished with the Union Army force under the command of Major General Frederick Steele during his Camden Expedition, part of the Red River Campaign. Gordon led more than one charge against the Union forces during Steele's march from Little Rock to Camden, Arkansas. On April 25, 1864, Gordon led his regiment at the Battle of Marks' Mills where they captured two Union artillery pieces from the detachment of Union Lieutenant Colonel Francis M. Drake when Shelby's force attacked the Union left wing of the detachment which had been sent from Camden toward Pine Bluff, Arkansas to obtained supplies for Steele's force which was increasingly besieged by gathering Confederate forces at Camden. The Confederates outnumbered the Union force at Marks' Mills by more than 2 to 1 and overwhelmed it, taking about 1,300 prisoners and about 240 wagons. The overall commander of the Confederate cavalry force at Marks' Mills, Brigadier General James Fagan, led the Confederates, including Shelby's command, toward Pine Bluff in an effort to capture the Union supply depot. The Confederates did not make it to Pine Bluff due to flooding. They also did not return fast enough to cut off Steele's return march to Little Rock or to participate in the Battle of Jenkins' Ferry, the one big engagement during the retreat before the Union troops escaped across the swollen Saline River.
 Passage 3:Ximing Temple () was a famous temple in Chang'an, the capital of the Tang dynasty in Chinese history. Chang'an, current day Xi'an, was the eastern terminus of the Silk Road, and a cosmopolitan metropolis. Ximing was established by Tang Gaozong in 656. It was at Ximing that pilgrim and traveller Xuanzang (602-664) had translated the scriptures he had brought back from India. Another traveller Yijing (635-713) also based himself at Ximing while working on translations of Indian scriptures. Indian scholar monk Shubhākarasimha, was responsible for the introduction of the Mahavairocana Sutra and the tantric traditions associated with it. Japanese monk, Kukai studied Sanskrit there under the tutelage of Gandharan pandit Prajñā (734-810?) who had been educated at the Indian Buddhist university at Nalanda. Ximing was celebrated for its library which was the most comprehensive library of Buddhist texts in China at the time. Woncheuk (613–696) (Chinese Yuáncè) was a Korean Buddhist monk, also known as Ximing Fashi (西明法师) after the name of this temple where he did most of his important work.

A:
3