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: What year was Franz Ferdinand assassinated? Passage 1:Đorđević was born in Belgrade to a prominent Serbian family. When he was a law student, the Germans invaded Yugoslavia during World War II and he joined the resistance movement of Dragoljub Mihailovic. Đorđević was captured by the Germans and was imprisoned, ultimately in Mauthausen-Gusen concentration camp in Austria. He survived the war, but was in turn imprisoned by the communist regime in post World War II Yugoslavia. After he was pardoned and released, Đorđević was eventually allowed to commence study at the University of Belgrade, where he was a student of Vaso Čubrilović (one of the members of the Young Bosnia who conspired to assassinate Franz Ferdinand which led to the outbreak of World War I). Đorđević was awarded his doctorate in 1962. In 1970, Đorđević took up a position as a Full Professor of History at the University of California, Santa Barbara, joining a strong faculty in European History including Joachim Remak, Frank J. Frost, Leonard Marsak, Alfred Gollin, and C. Warren Hollister. He was elected a member of the Serbian Academy of Science and Arts in 1985. A popular undergraduate lecturer and graduate mentor at the University of California, Santa Barbara, in 1992 many of his former students contributed to his Festschrift entitled Scholar, Patriot, Mentor: Historical Essays in Honor of Dimitrije Djordjevic. In retirement, Đorđević published his autobiography, Scars and Memory: Four Lives in One Lifetime, describing his World War II and post World War II experiences. Professor Đorđević died in Santa Barbara on March 5, 2009.
 Passage 2:Born in Mogadishu, Somalia in 1977, her father was a police criminal investigator who died of torture and lack of access to medical care due to political and clan-based violence when Mire was 12. After this traumatic experience, in 1991, she fled Somalia with her mother and siblings on a relative's lorry during the Somali Civil War. Mire and her identical twin, Sohur, emigrated to Sweden where an older sister lived and received asylum. The twins later moved to the United Kingdom to study. Mire studied Scandinavian pre-history and archaeozoology at Lund University in Sweden before receiving a BA degree in History of Art/Archaeology of Africa and Asia at SOAS, University of London in 2005, and subsequently an MA in African Archaeology in 2006 and PhD degree in Archaeology in 2009 at University College London.
 Passage 3:Samuel Perry (c.1864 – 19 March 1930) was the son of John and Harriett Perry (ca.1834 – 24 September 1918) of Shropshire, England, and the brother of Rev. Isaiah Perry (1854–1911). He was apprenticed as an iron worker to the Coalbrookdale Company, where he trained as an engineer. At the age of 22, around 1886, he followed his brother to Gawler, South Australia, where he found employment at James Martin's "Phoenix Foundry", living with the Roediger family at nearby Buchfelde (later named Loos). He next worked at Port Adelaide, then as foreman for John Danks & Son of Melbourne. He returned to Adelaide and started his own business with the purchase of James Wedlock's "Cornwall Foundry", the transfer of that factory to new premises Perry Engineering at Mile End, and the purchase of the James Martin & Co. workshops in Gawler. He took on his nephew Frank Perry, who became managing director and company chairman on his death.

Output:
1