Given the task definition and input, reply with output. 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 long is the canal that Sætren managed from 1891 to 1907? Passage 1:Sætren studied at Lillehammer Latin- og Realskole, at Qvams skole in Christiania and at the Swiss Federal Institute of Technology Zurich from 1862 to 1865. In 1866 he started working as a draftsman for Kanalvæsenet, the body for exploitation of Norwegian water resources, and held various positions at Kanalvæsenet over a period of 41 years. He ended his career as manager for the Bandak-Norsjø Canal from 1891 to 1907. The boat locks of the Bandak-Norsjø Canal could lift boats with a length of up to 100 feet. The canal became an important water transport system, and also a tourist destination. Sætren was a counsellor for industrialist Sam Eyde, the founder and first mangager of Norsk Hydro, who acquired rights for exploiting waterfalls for hydroelectric power. Sætren published maps and overviews of water resources in Norway, such as his map  from 1904. He was the first editor of the magazine Norsk Teknisk Tidsskrift, which he edited from 1883 to 1886. He was also a proponent for the construction of the Holmenkoll Line, and chaired the board of directors for ten years from 1896. He was decorated Knight of the Royal Norwegian Order of St. Olav in 1893.
 Passage 2:Frank Kratovil was born in Lanham, Maryland, spent his childhood in Prince George's County, Maryland. He is the son of Frank M. Kratovil Sr. and Lynnda Kratovil. Kratovil attended high school at Queen Anne School in Upper Marlboro and graduated in 1986. Kratovil received his bachelor's degree in 1990 from Western Maryland College. He joined Phi Delta Theta while there and played soccer, basketball and baseball. In soccer, he served as Captain for three years, was named to the Middle-Atlantic Conference All-Conference Team and received the Most Valuable Offensive Player Award and the Homer Earl Outstanding Player Award. Upon graduation, he was awarded the Bates Prize for the Most Outstanding Graduating Male, the Charles W. Havens Award, awarded to an intercollegiate athlete who "has shown by word and deeds the attributes of charity, altruism, benevolence, and a humane and compassionate concern for his fellow man", and the Carroll County Scholar-Athlete Award. Kratovil then graduated with honors from University of Baltimore School of Law in 1994. He served from 1994 to 1995 as Law Clerk for Judge Darlene G. Perry of Prince George's County Circuit Court. From 1995 to 1997 he served as Assistant State's Attorney for Prince George's County, Maryland.
 Passage 3:The 2012 World Series was the championship series of Major League Baseball's (MLB) 2012 season. The 108th edition of the World Series, the series was a best-of-seven playoff between the National League (NL) champion San Francisco Giants and the American League (AL) champion Detroit Tigers; the Giants won in a four-game sweep. This marked the Giants' seventh World Series title in franchise history, their second in San Francisco (they won five in New York), and their second in a three-year period (2010–2012). Their World Series sweep was the first by an NL team since the Cincinnati Reds swept the Oakland Athletics in the 1990 series and the first NL sweep not by the Reds since 1963, when the Los Angeles Dodgers swept the New York Yankees. This was also the first World Series since 1988 to feature both of that year's League MVPs (Miguel Cabrera for the AL and Buster Posey for the NL). The Giants' Pablo Sandoval, who in Game 1 tied a record by hitting three home runs in one World Series game, two off Tigers' ace pitcher Justin Verlander, was named the World Series Most Valuable Player (MVP).
1