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: Was Olivir's sister still alive when the Battle of Hafrsfjord took place? Passage 1:Olvir Hnufa or Ölvir hnúfa was a Norwegian commander in a clan and poet of the late ninth and early tenth centuries, known from, among other sources, Egil's Saga, Skaldatal and the Prose Edda. Olvir was the son of the viking Berle-Kari and brother-in-law of Kveldulf Bjalfason, who married Olvir's sister Salbjorg Karadottir; he was thus uncle to Skallagrim and Thorolf Kveldulfsson and great uncle to the famous poet Egil Skallagrimsson. Olvir also had a brother named Eyvind Lambi. Olvir was a prominent member of the court of King Harald Fairhair, who united Norway under his rule in the late ninth or early tenth century. Among other famous poets, he served as one of King Harald's court poets. He also served as a warrior in Harald's retinue, and fought at the pivotal Battle of Hafrsfjord on the king's flagship. He is best known for his involvement in the conflict between Harald and Olvir's kinsman Thorolf Kveldulfsson, which ended with the latter's death. Only a few fragments of Olvir's poetry survive.
 Passage 2:Specific attractions include the world's only complete collection of Vanwall cars, a near-complete collection of McLaren Formula One cars from the team's inception to the early 2000s, and extensive collections of Williams and BRM cars (including examples of both notorious BRM V16-powered machines as well as the H16-powered BRM P83). The collection also has examples of four different four-wheel drive Formula One cars, including an unraced Cosworth car. Another star exhibit is the Lotus 18 with which Stirling Moss won the 1961 Monaco Grand Prix, along with Jim Clark's World Championship-winning Lotus 25. Noticeable, however, is the distinct lack of Ferrari vehicles, 3 in all, but fine examples nonetheless. First being a Ferrari 312 driven by Chris Amon, second a 312B and thirdly, a Ferrari F2000 (The particular chassis driven to victory in the 2000 Canadian Grand Prix, one of nine victories for Michael Schumacher in his maiden championship winning series with Ferrari), conversely, the establishment houses the Jordan 191 in which he made his formula 1 debut in 1991. The 1998 Jordan 198, the most successful in Jordan's history, (the chassis being the one Damon Hill drove to victory in a 1-2 with team mate Ralf Schumacher at the 1998 Belgian Grand Prix at Spa Francorchamps) also figures. Another interesting exhibit is an Auto Union, built from pre-war plans following the factory's destruction by Allied bombing during World War II. Wheatcroft has also supplemented the racing car collection with some additional notable cars, including a replica of the personal Bugatti Royale of Ettore Bugatti.
 Passage 3:Before Trial by Jury, W. S. Gilbert and Arthur Sullivan had collaborated on one previous opera, Thespis; or, The Gods Grown Old, in 1871. Although reasonably successful, it was a Christmas entertainment, and such works were not expected to endure. Between Thespis and Trial by Jury, Gilbert and Sullivan did not collaborate on any further operas, and each man separately produced works that further built his reputation in his own field. Gilbert wrote several short stories, edited the second volume of his comic Bab Ballads, and created a dozen theatrical works, including Happy Arcadia in 1872; The Wicked World, The Happy Land and The Realm of Joy in 1873; Charity, Topsyturveydom and Sweethearts in 1874. At the same time, Sullivan wrote various pieces of religious music, including the Festival Te Deum (1872) and an oratorio, The Light of the World (1873), and edited Church Hymns, with Tunes (1874), which included 45 of his own hymns and arrangements. Two of his most famous hymn tunes from this period are settings of "Onward, Christian Soldiers" and "Nearer, my God, to Thee" (both in 1872). He also wrote a suite of incidental music to The Merry Wives of Windsor (1874) and many parlour ballads and other songs, including three in 1874–75 with words by Gilbert: "The Distant Shore", "Sweethearts" (inspired by Gilbert's play) and "The Love that Loves Me Not".
1