Given the task definition, example input & output, solve the new input case.
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: Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage 1: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lô during July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
. Passage 2: John Ford (1894–1973) was an American film director whose career spanned from 1913 to 1971. During this time he directed more than 140 films. Born in Maine, Ford entered the filmmaking industry shortly after graduating from high school with the help of his older brother, Francis Ford, who had established himself as a leading man and director for Universal Studios. After working as an actor, assistant director, stuntman, and prop man – often for his brother – Universal gave Ford the opportunity to direct in 1917. Initially working in short films, he quickly moved into features, largely with Harry Carey as his star. In 1920 Ford left Universal and began working for the Fox Film Corporation. During the next ten years he directed more than 30 films, including the westerns The Iron Horse (1924) and 3 Bad Men (1926), both starring George O'Brien, the war drama Four Sons and the Irish romantic drama Hangman's House (both 1928 and both starring Victor McLaglen). In the same year of these last two films, Ford directed his first all-talking film, the short Napoleon's Barber. The following year he directed his first all-talking feature, The Black Watch.
. Passage 3: Since the late 1970s, the central part of NYU is its Washington Square campus in the heart of Greenwich Village. Despite being public property, and expanding the Fifth Avenue axis into Washington Square Park, the Washington Square Arch is the unofficial symbol of NYU. Until 2008, NYU's commencement ceremony was held in Washington Square Park. However, due to space constraints, ceremonies are now held at the Yankee Stadium. Important facilities at Washington Square are the Elmer Holmes Bobst Library, designed by Philip Johnson and Richard Foster, who also designed several other structures, such as Tisch Hall, Meyer Hall, and the Hagop Kevorkian Center. When designing these buildings Johnson and Foster also set up a master plan for a complete redesign of the NYU Washington Square campus. However, it was never implemented. Other historic buildings include the Silver Center (formerly known as "Main building"); the Brown Building of Science; Judson Hall, which houses the King Juan Carlos I of Spain Center; Vanderbilt Hall, the historic townhouse row on Washington Square North; The Grey Art Gallery at 100 Washington Square East, housing the New York University art collection and featuring museum quality exhibitions; the Kaufman Management Center; and the Torch Club – the NYU dining and club facility for alumni, faculty, and administrators. Just a block south of Washington Square is NYU's Washington Square Village, housing graduate students and junior and senior faculty residences in the Silver Towers, designed by I. M. Pei, where an enlargement of Picasso's sculpture Bust of Sylvette (1934) is displayed.
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Output: 1
The question refers to the 704th unit and task about war which is decribed by Passage 1.

New input case for you: Question: What time period did the Byzantine Empire rule? Passage 1:American rapper Tyga has released seven studio albums, three compilation albums, nineteen mixtapes, seventy-four singles (including thirty-four as a featured artist) and forty-six music videos. In 2008, Tyga released his first studio album, No Introduction, on the record label Decaydance Records. The album featured the single "Coconut Juice", which features singer Travie McCoy; the song peaked at number 94 on the US Billboard Hot 100, becoming Tyga's first song to appear on the chart. In 2010, Tyga and American singer Chris Brown released the collaborative mixtape Fan of a Fan, which included the single "Deuces": the song peaked at number 14 on the Billboard Hot 100 and became Tyga's first song to chart on the US Hot R&B/Hip-Hop Songs chart, peaking at number one. Tyga also appeared on the song "Loyalty", a single by fellow rapper Birdman, and collaborated with rapper Lil Wayne on the non-album single "I'm on It", both of which failed to chart on the Billboard Hot 100.
 Passage 2:When Boris I assumed the throne of Bulgaria in 852, the country was still pagan, with the ruling Bulgar elite being Tengriists while the Slavic population practised its own religion. Christianity was already widespread in Bulgaria as the country was established on former territories of the Byzantine Empire, and seems to have been influential. Even one of the sons of Khan Omurtag (r. 814–831), Enravota, converted to Christianity. The Bulgarian nobility was strongly opposed to any form of Byzantine influence in the country and was therefore hostile to Christianity as it was directly associated with the Byzantine Empire. Boris I, however, had many reasons to consider conversion — Bulgaria was situated between two powerful Christian empires, Byzantium and East Francia; Christian doctrine particularly favoured the position of the monarch as God's representative on Earth; and finally, Boris also saw Christianity as a way to overcome the differences between Bulgars and Slavs. The geopolitical situation in the mid 9th century was also favourable because of the increasing friction and rivalry between the Papacy in Rome and the Ecumenical Patriarchate of Constantinople for influence in Central Europe. That struggle between the two churches would give the Bulgarian ruler the opportunity to manoeuvre and negotiate with both, thus extracting favourable concessions while keeping the country out of direct foreign influence. When the Byzantines invaded Bulgaria in the autumn of 863 and demanded conversion to Christianity from Constantinople as the single condition to retreat, Boris I readily accepted and was baptised in the beginning of 864, assuming the Christian name Michael after his spiritual godfather, the Byzantine Emperor Michael III. That step was very unpopular among the nobility, but when they rebelled Boris I dealt decisively with them and executed 52 magnates along with their whole families. When in the following year the Byzantines sturdily demonstrated their determination not to allow the existence of an autocephalous Bulgarian Church, Boris I decided to turn to the Papacy.
 Passage 3:At the end of the 2007–08 season, Humphreys was voted Player of the Year, Player of the 2000s and Hartlepool United's Player of the Century. He continued to be a key player in 2008–09, making a total of 54 appearances. He was a key figure once again in the 2009–10 season, missing just nine matches as a central midfielder. On 26 February 2011, Humphreys replaced Joe Gamble after 82 minutes to make his 473rd appearance for "Pools". This broke the record previously held by Watty Moore for over half a century. Over the course of the 2010–11 season he played 29 matches. On 2 August 2011, Humphreys was given a testimonial match against Premier League Sunderland to mark his ten years at Hartlepool United. Sunderland won 3–1, though the 5,757 fans present at the Victoria Park were reported to be very vocal in their appreciation of the veteran player. On 7 January 2012, Humphreys replaced Luke James 90 minutes into a 2–0 win over Rochdale to make his 500th appearance for "Pools". He signed an "undisclosed extension to his contract" in May 2012. He made 33 appearances in the 2012–13 campaign, as Hartlepool were relegated into League Two, though Humphreys was named on the League One team of the week after scoring in a 3–2 win at Sheffield United on 29 December.

Output:
2