Instructions: 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.
Input: Question: Did the B-47 Stratojet exist during World War II? Passage 1:RAF Mildenhall opened on 16 October 1934. King George V reviewed 350 aircraft there in 1935 on the occasion of his Silver Jubilee. This historical event is commemorated by a memorial tablet located in front of the Building 562, the current 100 ARW headquarters. During World War II, Mildenhall became a bomber station, flying Vickers Wellingtons, Short Stirlings and Avro Lancasters. It was also the headquarters of 3 Group Bomber Command. From 1950, Mildenhall became home to bombers and later tanker aircraft of the United States Air Force. Throughout the 1950s, Strategic Air Command bomber units were deployed on a regular rotational basis from the United States to the United Kingdom. The B-47 Stratojet was a familiar sight in the skies over RAF Mildenhall and RAF Upper Heyford at this time, as entire wings deployed on 90-day rotations. From 1976 to 1990, the SR-71 Blackbird was flown out of Mildenhall by Detachment 4 of the 9th Strategic Reconnaissance Wing of the USAF. RAF Mildenhall was, until 2003, the home of the largest military-sponsored air show in Europe, when it was cancelled because of increasing operational requirements.
Passage 2:In July 1952, Loring transferred to the 36th Fighter-Bomber Squadron full-time, where he served as operations officer. In this role he returned to combat duty, this time as a jet aircraft fighter pilot operating the F-80 Shooting Star. Missions for this unit primarily concerned close air support, air strikes and interdiction missions supporting United Nations Command ground troops in the country. In this role, Loring's unit primarily fought North Korean and Chinese ground targets. By November 22, 1952, Loring had completed 50 combat missions. At that time the ground battle in Korea had developed into a stalemate, with the two sides firmly entrenched along the 38th Parallel. Throughout November, the UN forces had been launching Operation Showdown against two targets: Triangle Hill and Sniper Ridge, northwest of Kunwha, north of the 38th Parallel. During the battle, the Chinese managed to amass 133 large caliber guns, 24 BM-13 rocket launchers and 47 anti-aircraft guns in the largest Chinese artillery operation during the Korean War, and it posed a serious threat to ground troops of the ROK 2nd Infantry Division operating in the area. The artillery was heavily guarded, forcing the UN forces to use airpower to combat them.
Passage 3:"Something" received the Ivor Novello Award for the "Best Song Musically and Lyrically" of 1969. Harrison subsequently performed the song at his Concert for Bangladesh shows in 1971 and throughout the two tours he made as a solo artist. Up to the late 1970s, it had been covered by over 150 artists, making it the second-most covered Beatles composition after "Yesterday". Shirley Bassey had a top-five UK hit with her 1970 recording, while Frank Sinatra regularly performed the song. Other artists who have covered "Something" include Elvis Presley, Ray Charles, Peggy Lee, James Brown, Tony Bennett, Andy Williams, Smokey Robinson and Ike & Tina Turner. In 1999, Broadcast Music Incorporated named "Something" as the 17th-most performed song of the twentieth century, with 5 million performances. In 2004, it was ranked at number 278 on Rolling Stones list of "The 500 Greatest Songs of All Time", while two years later, Mojo placed it at number 7 in the magazine's list of the Beatles' best songs. A year after Harrison's death in November 2001, McCartney and Eric Clapton performed it at the Concert for George tribute at London's Royal Albert Hall.

Output:
1