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.

Example Input: Question: Where was McMahon's post-doctoral mentor from? Passage 1:Ain't She Sweet was an American album featuring four tracks recorded in Hamburg in 1961 by The Beatles featuring Tony Sheridan (except for the title song with vocal by John Lennon) and cover versions of Beatles and British Invasion-era songs recorded by the Swallows. As Atlantic Records only had rights to four Sheridan/Beatle recordings recorded by Polydor Records, they filled the rest of the album with Beatle and British Invasion cover songs. When this material was released by Atco Records, there were mono (catalogue number 33-169) and stereo (SD 33-169) editions. Atco also added additional drum overdubs to the four Sheridan cuts on top of the original drum tracks. American drummer Bernard Purdie claims to have performed overdubs of unspecified Beatles records, which would most likely have been for Ain't She Sweet, but this has never been officially confirmed.
 Passage 2:McMahon contributed to the understanding of retinal neurophysiology alongside his post-doctoral mentor, John E. Dowling. His early research focused on ion channels that mediate transmission at electrical and glutamatergic synapses and the modulatory effects of dopamine and nitric oxide on retinal synapse networks. Through studies with zebrafish he discovered that the neurotransmitter dopamine decreases the electrical coupling within horizontal cells. Further research showed that it was the increase of cAMP within the cell resulting from dopamine binding to AMPA receptor that led to this decrease in coupling. McMahon and his colleagues also demonstrated that exogenous nitric oxide and zinc can modulate AMPA receptor mediated synaptic transmission at gap junctions in hybrid bass retinal neurons.
 Passage 3:The river starts at Ralph Bice Lake (formerly Butt Lake) in northern Algonquin Provincial Park in the geographic township of Butt in the Unorganized South Part of Nipissing District. It flows south to Daisy Lake then east to Big Trout Lake. The river heads north out the lake over Big Trout Lake Dam, takes in the left tributary Tim River, flows over the Portal Rapids, Cedar Rapids, Snowshoe Rapids, Catfish Rapids, and Stacks Rapids to reach Cedar Lake, the location of the community of Brent, where it takes in the left tributary Nipissing River. The river exits the lake over a dam, heads through the Devil's Chute, reaches Radiant Lake, where it takes in the left tributary North River and right tributary Little Madawaska River, and passes through the Squirrel Rapids, Big Sawyer Rapids, Battery Rapids Cascade Rapids and White Horse Rapids, and takes in the right tributary Crow River. The river then continues through a series of rapids including the Devil's Cellar Rapids, passes the Algonquin Radio Observatory, and reaches Lake Travers. The Petawawa River enters a canyon and passes through numerous rapids including the Big Thompson Rapids, Little Thompson Rapids, Grillade Rapids, Crooked Chute, Rollway Rapids, The Natch, Schooner Rapids, Five Mile Rapids to arrive at Whitson Lake adjacent to the Petawawa Hills. It leaves Algonquin Provincial Park and enters the municipality of Laurentian Hills in Renfrew County, continues southeast past CFB Petawawa, passes through the Crooked Rapids, Race Horse Rapids, White Horse Rapids and Halfmile Rapids, and reaches Lac du Bois Dur, where it takes in the right tributary Barron River. The river enters the town of Petawawa, heads under Ontario Highway 17, through the Big Eddy Rapids, under the Canadian Pacific Railway main line, and empties into Black Bay on the Ottawa River.

Example Output: 2

Example Input: Question: In which continent was Horiguchi diagnosed with tuberculosis? Passage 1:In 1911, Horiguchi left school to accompany his father on overseas postings and during the next 14 years overseas he became fluent in French (assisted by his Belgian stepmother) and interested in French literature, particularly the novels and poetry of the Symbolist movement. He first spent over a year in Mexico, where he was diagnosed with tuberculosis, causing Horiguchi to abandon his father's hope that he become a diplomat, and he devoted his time to writing verse and translation of French works instead. He was in Mexico during the Mexican Revolution, and it was also during this time that he was drawn to Parnassianism as a style of verse. In 1913, the family relocated to Belgium, via Siberia. While in Belgium, he studied the works of Paul Verlaine and the works of the Symbolist movement, including the works of Remy de Gourmont. He subsequently lived for brief periods in Spain, Paris, Brazil and Romania and maintained correspondence with Marie Laurencin and Thomas Mann, whose works he also translated while recuperating at a sanatorium in Switzerland.
 Passage 2:In 1980, Most was appointed Andrew W. Mellon Assistant Professor of Classics at Princeton University and remained in this position until 1985. In 1982/83, he was at the American Academy in Rome. In 1985/86, he taught at the Università degli Studi di Siena, from then until 1987 as visiting professor at the University of Michigan. In 1987, he followed a call from the Universität Innsbruck, becoming Ordentlicher Universitätsprofessor für Klassische Philologie und Altertumskunde. In 1988/89, he was a fellow at the Wissenschaftskolleg zu Berlin. In 1991, Most moved to a full professorship for Ancient Greek language and literature at the Ruprecht-Karls-Universität Heidelberg, where he taught until 2001. During these years, Most also was guest professor at the University of Michigan and professor at the Committee on Social Thought at the University of Chicago. In 1994, Most was the first classicist to receive the Leibniz-Preis of the Deutsche Forschungsgemeinschaft. Since 2001, he is teaching as Professor of Ancient Greek at the Scuola Normale at Pisa.
 Passage 3:Cungagnaq (; date of birth unknown - d. 1815) is venerated as a martyr and saint (as Peter the Aleut; ) by some jurisdictions of the Eastern Orthodox Church. He was allegedly a native of Kodiak Island (Alutiiq or Sugpiaq), and is said to have received the Christian name of Peter when he was baptized into the Orthodox faith by the monks of St Herman's missionaries operating in the north. He is purported to have been captured by Spanish soldiers near "San Pedro" and tortured and killed at the instigation of Roman Catholic priests either there or at a nearby location. At the time identified for his death, California was Spanish territory, and Spain was worried about Russian advances southwards from Alaska. Hubert Howe Bancroft, in his multi-volume History of California, only notes that, in connection with an incident wherein a Russian fur-hunting expedition was taken into custody after declining to leave San Pedro; one Russian source accused "the Spaniards of cruelty to the captives, stating that according to Kuskof’s report one Aleut who refused to become a Catholic died from ill-treatment received from the padre at San Francisco."

Example Output: 1

Example Input: Question: Who was Elwood fighting against during the Kosovo War? Passage 1:FM 1220 begins at an intersection with SH 183 in the Far Greater Northside area of Fort Worth. The highway travels in a northwestern direction along Azle Avenue through a residential area and runs along the northern edge of Sansom Park before entering Lake Worth. In Lake Worth, FM 1220 has a junction with I-820 and turns north onto Boat Club Road near Lake Worth High School. The highway travels in a northern direction near several subdivisions, running between Lake Worth and Marine Creek Reservoir, before re-entering Fort Worth near Saginaw. FM 1220 continues to run near several subdivisions in far northwest Fort Worth and turns west north of an intersection with Park Drive, then enters the town of Eagle Mountain. The highway runs through the town and runs close to Eagle Mountain Lake. West of Eagle Mountain, the Boat Club Road designation leaves the highway, with FM 1220's local designation becoming Morris Dido Newark Road. The highway runs in a northwestern direction near the eastern shore of Eagle Mountain Lake with state maintenance ending at Peden Road at the southern boundary of Pecan Acres; Morris Dido Newark Road continues past Peden Road for another to FM 718 near Newark.
 Passage 2:Ellwood graduated from Duntroon in 1990 and was commissioned into the Royal Australian Infantry Corps. His early career included postings as a platoon commander in the 2nd/4th Battalion, Royal Australian Regiment and as an instructor in field training and tactics at Duntroon, before he was seconded to the British Army from 1998 for a two-year exchange with the Irish Guards, then stationed in Germany. During the secondment he deployed as part of the NATO intervention in the Kosovo War in 1999, serving as second-in-command of an armoured infantry company in the King's Royal Hussars Battle Group. For his service in Kosovo, Ellwood was awarded a Commander British Forces Commendation. He returned to Australia as a company commander and operations officer in the 5th/7th Battalion, Royal Australian Regiment (5/7RAR). Ellwood commanded B Company on operations in East Timor from October 1999 to April 2000, when 5/7RAR deployed with the International Force East Timor.
 Passage 3:Kavanagh was a Marvel Comics editor from 1985 to 1997. Titles he edited during that time included Marvel Comics Presents and Nick Fury, Agent of S.H.I.E.L.D. Writer/artist Alan Davis, who Kavanagh edited on Excalibur, said "Terry Kavanagh spoiled me, gave me near total freedom, and encouraged me to experiment." In 1987, he began to write for Marvel with his first published story "Cry Vengeance!" appearing in Kickers, Inc. #4 (Feb. 1987). He later wrote such titles as Marc Spector: Moon Knight, Avengers: Timeslide, X-Man and X-Universe. In Web of Spider-Man #100 (May 1993), Kavanagh and artist Alex Saviuk gave the lead character "Spider-Armor". He wrote the Spider-Man/Punisher/Sabretooth: Designer Genes one-shot the following month. Kavanagh was one of the writers on the "Maximum Carnage" storyline which ran through the various Spider-Man titles in 1993. The first Black Cat limited series was co-written by Kavanagh and Joey Cavalieri in 1994. Kavanagh pitched a storyline involving the return of Spider-Man's clone, which then formed the basis of the "Clone Saga" which began in Web of Spider-Man #117 (Oct. 1994). Kavanagh's last new comics project was the Before the Fantastic Four: The Storms limited series in 2000–2001.

Example Output:
2