Question: How old was Lin Zexu when he was ordered by the Daoguang Emperor to enforce the imperial ban on opium in Canton? Passage 1:In 1839, Lin Zexu, who himself was a Fuzhou native, was appointed by the Daoguang Emperor to enforce the imperial ban on the opium trade in Canton. His unsuccessful actions, however, precipitated the disastrous First Opium War with Great Britain, and Lin, who had become a scapegoat for China's failure in war, was exiled to the northwestern section of the empire. The Treaty of Nanjing (1842), which put an end to the conflict, made Fuzhou (then known to Westerners as Foochow) one of five Chinese treaty ports, and it became completely open to Western merchants and missionaries. was one of the most important Protestant mission fields in China. On January 2, 1846, the first Protestant missionary, Rev. Stephen Johnson (missionary) from ABCFM (美國公理會差會), entered the city and soon set up the first missionary station there. ABCFM was followed by the Methodist Episcopal Missionary Society that was led by Revs. M. C. White and J. D. Collins, who reached Fuzhou in early September 1847. The Church Missionary Society also arrived in the city in May 1850. These three Protestant agencies remained in Fuzhou until the communist revolution in China in the 1950s, leaving a rich heritage in Fuzhou's Protestant culture. They supported the creation of hospitals and schools, including the Woolston Memorial Hospital, run by the American-trained Hü King Eng.
 Passage 2:Herpesviruses are a third group of common cancer-causing viruses. Two types of herpesviruses have been associated with cancer: the Epstein–Barr virus (EBV) and human herpesvirus 8 (HHV-8). EBV appears to cause all nonkeratinizing nasopharyngeal carcinomas and some cases of lymphoma, including Burkitt's lymphoma—the association is especially strong in Africa—and Hodgkin's disease. EBV has also been found in a variety of other types of cancer cells, although its role in causing these other cancers is not well established. KSHV/HHV-8 causes all cases of Kaposi's sarcoma, and has been found in some cases of a cancer-related condition called Castleman's disease. Studies involving other kinds of cancer, particularly prostate cancer, have been inconsistent. Both of these herpesviruses are commonly found in cancerous cells of primary effusion lymphoma. Herpesviruses also cause cancer in animals, especially leukemias and lymphomas.
 Passage 3:As far back as 1854, the famous glass exhibition building known as The Crystal Palace had been relocated from Hyde Park, London and rebuilt in an area of South London next to Sydenham Hill. This area was renamed Crystal Palace including the park surrounding the site where various sports facilities were built. The earliest known Crystal Palace football team first played here in 1861 as an amateur outfit. They went on to become founder members of the Football Association and competed in the very first FA Cup competition reaching the semi-finals where they were eliminated by the Royal Engineers in a replay after the first game ended goalless. The team also played in the FA Cup in the next four seasons before disappearing from historical records after a 0–3 defeat to eventual winners Wanderers in the second round of the 1875–76 FA Cup. In 1895, the Football Association adopted a new permanent home for the FA Cup Final which was to be played at the sports stadium situated inside the historic grounds of the Palace. With the owners also reliant on tourist activity for their income, they sought fresh attractions for the venue, and founded the London County Cricket Club of W. G. Grace before turning their attention to football.

Output: 1