Definition: 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: At what age did Huizong's surviving son declare himself as the dynasty's tenth emperor? Passage 1:Cumberlidge played for Stoke City, before joining Port Vale as an amateur in October 1936. He made his debut in February 1937, and signed professional forms the following month. He made eight Third Division North appearances in the 1936–37 season, and played 23 league games in the 1937–38 season. He featured 35 times in the Third Division South in the 1938–39 campaign. He converted to left-half for the 1939–40 season, having previously been used as a left-back and inside-forward. After the conclusion of World War II, he was out of favour and barely played before he was transferred to Northwich Victoria. He managed the "Vics" in the Cheshire County League in 1968.
 Passage 2:Emperor Huizong of Song (7 June 1082 – 4 June 1135), personal name Zhao Ji, was the eighth emperor of the Song dynasty in China. He was also a very well-known calligrapher. Born as the 11th son of Emperor Shenzong, he ascended the throne in 1100 upon the death of his elder brother and predecessor, Emperor Zhezong, because Emperor Zhezong's only son died prematurely. He lived in luxury, sophistication and art in the first half of his life. In 1126, when the Jurchen-led Jin dynasty invaded the Song dynasty during the Jin–Song Wars, Emperor Huizong abdicated and passed on his throne to his eldest son, Zhao Huan who assumed the title Emperor Qinzong while Huizong assumed the honorary title of Taishang Huang (or "Retired Emperor"). The following year, the Song capital, Bianjing, was conquered by Jin forces in an event historically known as the Jingkang Incident. Emperor Huizong, along with Emperor Qinzong and the rest of their family, were taken captive by the Jurchens and brought back to the Jin capital, Huining Prefecture in 1128. The Jurchen ruler, Emperor Taizong of Jin, gave the former Emperor Huizong a title, Duke Hunde (literally "Besotted Duke"), to humiliate him. After his surviving son, Zhao Gou, declared himself as the dynasty's tenth emperor as Emperor Gaozong, the Jurchens used him, Qinzong, and other imperial family members to put pressure on Gaozong and his court to surrender. Emperor Huizong died in Wuguo after spending about nine years in captivity.
 Passage 3:Henderson was born in 1778, the son of prominent naval officer Captain William Henderson of Aberdeen, an important landowner in Forfarshire. Educated at Marischal College, Henderson followed his father into the British Royal Navy in 1792 as a midshipman in HMS Southampton shortly before the outbreak of the French Revolutionary Wars. Serving during the war, Henderson became a lieutenant in 1799 aboard the sloop HMS Osprey and was still aboard her during the successful invasion of Saint Lucia in 1803. Later in the year, Osprey attacked a schooner off Trinidad and Henderson, who led the boarding party, was very seriously wounded. The following year, still on Osprey, Henderson led another boarding party that captured the French privateer Resource off Trinidad. For this service, Henderson was awarded a sword by the Lloyd's Patriotic Fund of London and moved to the ship of the line HMS Centaur.

Output:
2