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: Who was Thor's alter ego? Passage 1:In 1860 Binding moved to Göttingen where he studied history and jurisprudence. After a short stay in Heidelberg, where he won a law prize, he moved back to Göttingen to finish his studies. In 1864 he completed his habilitation paper in Latin about Roman criminal law and lectured in criminal law at Heidelberg University. Two years later he was appointed professor of law of state and criminal law and procedure in Basel, Switzerland. In the same year he married Marie Luise Wirsing and published Das burgundisch-romanische Königreich and Entwurf eines Strafgesetzbuches für den Norddeutschen Bund. At this time he also became friends with Johann Jacob Bernoulli - an archaeologist, Jakob Burckhardt - an art historian, and Friedrich Nietzsche - a philosopher. In August 1867 his first son, Rudolf Georg, was born, followed two years later by his second son. Rudolf G Binding later became a famous writer. Karl Binding and his wife were to have one more son and two daughters. In 1869 his family moved to Freiburg, and Binding volunteered to fight in the Franco-Prussian War. Although his lack of military training meant he was unable to serve as a soldier, he was accepted as an orderly and posted to the front, serving in a field hospital. In 1872 he took on a post at the Reichs University in Straßburg. In the same year he moved to Leipzig University, where he was to continue to work for the next 40 years. From 1879 until to 1900 Binding worked in the district court of Leipzig. After becoming Leipzig University's rector and receiving his emeritus, he moved to Freiburg, where his wife died only a few days later at 71 years old. In 1918, during the First World War, Binding left Germany to lecture German soldiers in Macedonia and Bulgarian intellectuals in Sofia.
 Passage 2:Defeating the aliens, Thor shares a double life with his alter ego: treating the ill in a private practice with nurse – and eventual love – Jane Foster, and defending humanity from evil. Thor's presence on Earth almost immediately attracts the attention of his adoptive brother and enemy Loki. Loki is responsible for the emergence of three of Thor's principal foes: the Absorbing Man; the Destroyer, and the Wrecker. On one occasion, Loki's tactics were accidentally beneficial – although successful in using an illusion of the Hulk to draw Thor into battle, it results in the formation of the superhero team the Avengers, of which Thor is a founding and longstanding member. Thor's other early foes include Zarrko, the Tomorrow Man; the Radioactive Man; the Lava Man; the Cobra; Mister Hyde; the Enchantress and the Executioner, and the Grey Gargoyle.
 Passage 3:Latin pop became the most popular form of Latin music in the United States during the 1980s and 1990s, with acts such as Puerto Rican boyband Menudo, even achieving massive crossover success among non-Latino listeners during the late 1990s. While not restricted to America by any means, Latin pop was profoundly affected by production techniques and other styles of music — both Latin and otherwise — that originated primarily in the United States. Tejano music, centered in Texas and the U.S./Mexico border region, had begun to introduce synthesizers, slicker production, and a more urban sensibility to formerly root styles like norteño and conjunto. Moreover, New York and Miami were home to thriving Latin club scenes, which during the 1980s led to the rise of Latin freestyle, a club-oriented dance music that was rooted in Latin rhythms but relied on synthesizers and drum machines for most of its arrangements. Both of these sounds influenced the rise of Latin pop, which retained Latin rhythms in its uptempo numbers but relied more on mainstream pop for its melodic sense.

Output:
2