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: Was Nathan Sivin alive when Han Zhenhua claimed that Nanhai referred to the Scarborough Shoal? Passage 1:Santley was the elder son of William Santley, a journeyman bookbinder, organist and music teacher of Liverpool in northern England. He had a brother and two sisters, one of whom named Catherine should not be confused with the actor-manager Kate Santley. He was educated at the Liverpool Institute High School, and as a boy sang alto in the choir of a local Unitarian church. His voice began to break before he was fourteen. Following musical lessons from his father (who insisted upon his singing tenor), he passed the examination for admission to the second tenors of the Liverpool Philharmonic Society on his fifteenth birthday, and in the same year took part in the concerts at the opening of the Philharmonic Hall. It was not until he reached the age of seventeen to eighteen that he rebelled against his father's decree and dropped into the bass clef, and was pronounced to be a bass. Santley was apprenticed to the provision trade. He enlisted, however, as a violinist in the Festival Choral Society and the Societa Armonica, and as a chorus member, with his father and sister, he sang in a performance of Haydn's The Creation at the Collegiate Institution, Liverpool, in which Jenny Lind was a soloist. Soon afterwards he was in a hand-picked choir for Handel's Messiah, where the tenor Sims Reeves headed the soloists, at the Eisteddfod at Rhuddlan Castle, and was in the chorus for Elijah and Rossini's Stabat Mater under Julius Benedict at the Liverpool Festival. He heard Pauline Viardot, Luigi Lablache and Mario there. While acting as accompanist to his sister at St. Anne's Catholic Church, Edge Hill, Liverpool, he sang 'Et incarnatus est' from Haydn's Second Mass, reading from the same score as Julius Stockhausen, as a trial, and obtained a place as bass soloist, modelling himself upon the style of the Austrian bass Josef Staudigl (18071861), and of the German bass Karl Formes (18151889) (whom he heard as Sarastro in London).
Passage 2:Dew was born in Sumner, Washington, and began his acting career in the mid 1930s, appearing in small film roles. His first film roles of any substance were as Captain Kendall in Military Academy (1940) and Henchman French in Dude Cowboy (1941). His first starring role was as Scott Yager in Red River Robin Hood (1942). This was followed by two leading roles for Republic Pictures in the westerns Beyond the Last Frontier (1943) and Raiders of Sunset Pass (1943). Afterwards Dew worked for Universal Pictures for the next decade, appearing mostly in supporting roles. Many of the pictures he made with Universal during the 1940s were with Rod Cameron, such as Trigger Trail (1944) and Renegades of the Rio Grande (1945).
Passage 3:The People's Republic of China and the Republic of China (Taiwan) claim that Chinese people discovered the shoal centuries ago and that there is a long history of Chinese fishing activity in the area. The shoal lies within the nine-dotted line drawn by China on maps marking its claim to islands and relevant waters consistent with United Nations Convention on the Law of the Sea (UNCLOS) within the South China Sea. An article published in May 2012 in the PLA Daily" states that Chinese astronomer Guo Shoujing went to the island in 1279, under the Yuan dynasty, as part of an empire-wide survey called "Measurement of the Four Seas" (), however, no such 13th century map has been made public by China nor such evidence on the existence of the map is known. In 1979 historical geographer Han Zhenhua () was among the first scholars to claim that the point called "Nanhai" (literally, "South Sea") in that astronomical survey referred to Scarborough Shoal. In 1980 during a conflict with Vietnam for sovereignty over the Paracel Islands (Xisha Islands), however, the Chinese government issued an official document claiming that "Nanhai" in the 1279 survey was located in the Paracels. Historical geographer Niu Zhongxun defended this view in several articles. In 1990, a historian called Zeng Zhaoxuan () argued instead that the Nanhai measuring point was located in Central Vietnam. Historian of astronomy Chen Meidong () and historian of Chinese science Nathan Sivin have since agreed with Zeng's position in their respective books about Guo Shoujing.

Output:
3