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.

Question: How many more wins did the 1961 World Champion have than the 1963 world champion? Passage 1:Iris Chang was the daughter of two university professors, Ying-Ying Chang and Dr. Shau-Jin Chang, who emigrated from Taiwan to the United States. Chang was born in Princeton, New Jersey and raised in Champaign-Urbana, Illinois. Chang grew up hearing stories about the Nanking massacre, from which her maternal grandparents managed to escape. When she tried finding books about the subject in Champaign Public Library, she found there were none. She attended University Laboratory High School of Urbana, Illinois and graduated in 1985. She was initially a computer science major, but would later switch to journalism, earning a bachelor's degree at the University of Illinois at Urbana-Champaign in 1989. During her time in college she also worked as a New York Times stringer from Urbana-Champaign, and wrote six front-page articles over the course of one year. After brief stints at the Associated Press and the Chicago Tribune, she pursued a master's degree in Writing Seminars at Johns Hopkins University. She then embarked on her career as an author and lectured and wrote magazine articles. She married Bretton Lee Douglas, a design engineer for Cisco Systems, whom she had met in college, and had one son, Christopher, who was 2 years old at the time of her suicide. She lived in San Jose, California in the final years of her life.
 Passage 2:It was the 12th New Zealand Grand Prix, doubled as the opening round of the 1965 Tasman Series. The race attracted 19 starters, including several overseas based drivers and teams. A large contingent of cars from Australia competed, including Frank Gardner competing for Alec Mildren Racing. Lex Davison and Leo Geoghegan brought across their own teams, while 1962 Formula One world champion, British racer Graham Hill race a Brabham for David McKay's Scuderia Veloce team. Star attraction though was the appearance of Team Lotus with their lead driver, 1963 World Champion, Jim Clark. Local honour was upheld by Bruce McLaren, who in an early iteration of the later McLaren team brought a pair of factory supported Coopers to race with American racer, the 1961 World Champion Phil Hill as his number two. The race was won by Graham Hill, his first victory in the NZGP. Gardner finished second to be the first 'antipodean' while first New Zealander was domestic series racer Jim Palmer in a career highlight as Brabham racing cars clean swept the podium.
 Passage 3:Ross' first plywood installation was a 1976 cutout of Clint Eastwood, which he and a friend placed as a prank above a railroad trestle to recreate a scene from Dirty Harry in the location where the scene had been filmed five years earlier. In 1983 Ross created "154 Nevermore", an installation of 154 plywood ravens on a highway in Jackson, Wyoming (recreated in steel in 2000). In 1984, Ross created "the Catch", a diorama for the Baseball Hall of Fame illustrating a legendary catch with the same nickname, by Willie Mays in the 1954 World Series. He created a new version of the work in 2004, and displayed it in various locations in New York City. In 1998 Ross created "The Defining Moment" for SAFECO Field, a tableau of 11 steel cutouts of a Ken Griffey, Junior play in the 1995 baseball playoffs. Ross' 2005 work, "Custer's Last Stand", was a recreation of life-sized warriors riding life-sized horses the Battle of Little Bighorn at the original site at Medicine Tail Coulee in Montana. That exhibit toured Cody, Wyoming, Jackson, Wyoming, and Sun Valley, Idaho. In September, 2008 Ross recreated a 1902 photograph of Buffalo Bill Cody and his "Wild West Show", his traveling troupe of Native Americans, in front of the Cliff House at Ocean Beach.
2