Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Question: What was the population of Paris the year Zambezi Sun debuted at Longchamp Racecourse? Passage 1:Trained by Pascal Bary, Zambezi Sun made his debut at the beginning of April 2007 at Longchamp Racecourse in Paris, winning the Prix Juigne, an event for unraced three-year-old colts and geldings. In his next start on April 29, he won the Prix de Nanterre at the Longchamp course and then on June 3 at Chantilly Racecourse he ran fourth to winner Lawman in the Group 1 Prix du Jockey Club. Back at Longchamp Racecourse, Zambezi Sun rebounded to win the prestigious G-1 Grand Prix de Paris. He did not race again until mid September when he ran third to Soldier of Fortune in the Prix Niel. In October he finished eighth in France's most prestigious race, the Prix de l'Arc de Triomphe. In contention during the final stretch run, eventual winner Dylan Thomas cut sharply in front of Zambezi Sun, but a claim of interference was rejected by the racing stewards.
Passage 2:On graduating in 1943, Shea enlisted in the U.S. Navy and enrolled in a program that would put him through college. He began his studies at Dartmouth College, later moving to MIT and finally to the University of Michigan, where he would remain until he earned his Doctorate in 1955. In 1946, he was commissioned as an Ensign in the Navy and received a Bachelor of Science degree in Mathematics. Shea went on to earn a MSc (1950) and a Ph.D. (1955) in Engineering Mechanics from the University of Michigan. While obtaining his doctorate, Shea found the time to teach at the university and to hold down a job at Bell Labs.
Passage 3:Twin Needles is located in the marine west coast climate zone of western North America. Most weather fronts originate in the Pacific Ocean, and travel northeast toward the Cascade Mountains. As fronts approach the North Cascades, they are forced upward by the peaks of the Cascade Range, causing them to drop their moisture in the form of rain or snowfall onto the Cascades (Orographic lift). As a result, the west side of the North Cascades experiences high precipitation, especially during the winter months in the form of snowfall. During winter months, weather is usually cloudy, but, due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer. Because of maritime influence, snow tends to be wet and heavy, resulting in high avalanche danger. Precipitation runoff from the peaks drains into tributaries of Skagit River.

Student:
1