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.
.
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: How many years long was the period in which copper mineralization and pipe formation occurred? Passage 1:The copper ore deposits are those of a typical copper porphyry and associated alteration-mineralization. These altered zones include chalcopyrite, pyrite, bornite and molybdenite as hypogene minerals and chalcocite as a supergene mineral. The ore body surrounds the Braden Pipe in a continuous ring with a width of 2000 feet. The pipe is a geologic structure in the shape of an inverted cone, having a surface diameter of 4000 feet, and consisting of post-pipe breccia called the Braden Formation. The boundary of the pipe is marked by this post-pipe breccia and a pre-pipe breccia forming a belt up to 200 feet wide. "The Braden Pipe was a center of strong mineralization and structural weakness before the pipe was formed." Copper mineralization and pipe formation occurred in the Pliocene. Ore was originally mined from the Fortuna orebody at the southwest quadrant starting in 1906. Since 1922, the larger Teniente orebody has also been mined on the east side. "The best grade of ore is found in altered andesite or in andesitic flow breccia adjacent to the pre-pipe breccia."
 Passage 2:Lewis University's WLRA Radio was the first college radio station in the country to become digital. Lewis University received a $350,000 digital broadcasting project grant in the 1990s from philanthropy of The Andrew Corporation, a leading worldwide communications corporation. The studios, music archives, music scheduling system, audio storage and retrieval systems (including an AES/EBU Broadcast Electronics – Audiovault serial number 001 and 002), digital audio consoles, CD players & recorders, minidisc players and recorders, and DAT), ISDN digital phone system, ISDN and IP remote broadcast codecs, Optimod 8700 AES/EBU audio processing, AES/EBU broadcast delay, Harris Digit AES/EBU fm exciter, and transmitters were upgraded from analog to state of the art digital AES3 type I balanced and type II optical. The entire digital project was a joint venture with the Freberg Communications Corporation of Illinois, Harris Corporation of Florida, Pacific Research and Engineering of California, A-Ware Corporation (Musicmaster)  of Wisconsin, and Broadcast Electronics Corporation of Illinois. WLRA also added RDS Radio Data System to the FM transmission allowing information about the artist and song to be displayed on a radio tuned to 88.1-FM. Lewis University installed a new self standing radio tower and new digital IBOC or HD Radio ready ERI Rototiler  single bay fm antenna in 2000 adjacent to DeLaSalle Hall. WLRA increased the antenna height to HAAT and had to reduce the effective radiated power to 140 watts. WLRA moved from the basement of Fitzpatick Hall dormitory basement to new studios and broadcasting center in December 2005. The new broadcasting facility was named The Andrew Center of Electronic Media at Lewis University. The state of the art broadcasting studios and transmitters are located in DeLaSalle Hall on the Lewis University Romeoville campus. In 2005 WLRA began streaming a simulcast of the station over the Internet and in 2008 mobile media APPs for the Apple iPhone and iPod Touch. Simultaneously Apple added WLRA as one of their iTunes Radio Stations under College format. WLRA uses an AES3 Orban Opticodec audio processing/encoder for their 128kbs and 64kbs bit streams. In 2010, WLRA and Broadcast Electronics, Inc. integrated social media automation and Twitter with the newest generation of Broadcast Electronics AudioVault (FLEX) and Message Manager (TRE) RBDS data. The automation allow listeners to be notified of favorite artist being played through tagging. WLRA was the first station to have Broadcast Electronics integrate customer supplied computers, paving the way for other stations to upgrade into new generation Audiovault FLEX. In the Spring of 2012 WLRA was among the first 15 colleges selected to be part of Clear Channel Communication's iHeartRadio for both internet streaming and mobile media apps.
 Passage 3:In 1986, Mehboob met music composer Ismail Darbar who used to play the violin in film orchestras in those days. And it was Darbar who taught him the difference between poetry and film lyrics. Darbar introduced Mehboob to filmmaker Ram Gopal Varma and he began his song writing career with Varma's 1992 film Drohi whose music was composed by R. D. Burman. He then worked with A.R.Rahman on Varma's Rangeela. Rahman liked his work and introduced him to Mani Ratnam and Mehboob penned the lyrics for the Hindi (dubbed) version of Bombay. Mehboob went on to work with Rahman on films such as Thakshak, Doli Saja Ke Rakhna and Dubbed version of Dil Hi Dil Mein. He has also written the lyrics for Rahman's non-film album Maa Tujhe Salaam as well as Ratnam's Yuva.

Output:
1