You will be given a definition of a task first, then some input of the task.
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: How old was von Braun when his team installed Walter rockerts into experimental aircrafts? Passage 1:In 2012, Hudson Mohawke began a series of collaborations with Kanye West, resulting in production credits on the GOOD Music label album Cruel Summer. On 17 January 2013, it was announced that Mohawke had officially signed with GOOD Music as a producer, whilst remaining with Warp and LuckyMe as a recording artist. TNGHT announced their hiatus on 27 December 2013. Mohawke co-produced two tracks on West's 2013 album Yeezus ("I Am a God" and "Blood on the Leaves") and contributed to West's 2016 follow-up The Life of Pablo, in addition to working with various other hip hop and pop artists, including Drake, Pusha T, and Future. In 2015, he released his second studio album, Lantern. In 2016, he collaborated with singer Anohni on her 2016 album Hopelessness. Mohawke announced on 26 October 2016 via Twitter that he was creating the original soundtrack for the 2016 video game Watch Dogs 2 titled "Ded Sec" and that Warp Records would release it on 11 November 2016.
 Passage 2:At the same time that Walter was developing submarine engines, he was also applying his ideas to rocketry. The high-pressure gas mixture created by the rapid decomposition of hydrogen peroxide could not only be used in a turbine, but if simply directed out of a nozzle, created considerable thrust. Wernher von Braun's rocketry team working at Peenemünde expressed interest in Walter's ideas, and in 1936 began a programme of installing Walter rockets into aircraft. The experimental results obtained by von Braun created interest among Germany's aircraft manufacturers, including Heinkel and Messerschmitt, and in 1939, the Heinkel He 176 became the first aircraft to fly on liquid-fuelled rocket power alone. This type of engine went on to become the cornerstone of the Messerschmitt Me 163 rocket-powered fighter, when married to Alexander Lippisch's revolutionary airframe design. Throughout the course of World War II, Walter's aircraft engines became increasingly powerful and refined. The original design of simply decomposing hydrogen peroxide was soon changed to its use as an oxidizer (much like dinitrogen tetroxide would be used later) when combined with a hydrazine/methanol true rocket fuel designated C-Stoff, into the hot, high-pressure gases, and in later, never-deployed developments, a second, 400 kg (880 lb) thrust "cruising" combustion chamber, nicknamed a Marschofen, was added below the main chamber to allow for more precise control of the engine. Versions of this engine were intended to power a variety of aircraft design proposals and missile projects and was also licence-built in Japan (see HWK 109-509).
 Passage 3:Mark Huddleston, was elected after a Board meeting on June 12, 2004. He succeeded Thomas Courtice, who held office for 10 years. Huddleston's specializes in public administration, a field in which he has published widely, focusing on the senior federal career service and a variety of international issues. Before coming to Ohio Wesleyan, Huddleston served in the faculty of the University of Delaware for 24 years, ultimately as the Dean of the College of Arts and Sciences. Huddleston has been an active consultant for both the U.S. government and international organizations in the past. He worked previously in the Balkans, southern Africa, and central and southeast Asia. He gained international development experience in Bosnia as an advisor on rebuilding financial and administrative infrastructures following the Dayton Accords. He has authored the following books: The Public Administration Workbook, Profiles in Excellence: Conversations with the Best of America's Career Executive Service, The Higher Civil Service in the United States, and The Government's Managers.

Output:
2