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: Which leader of SDKPiL is the oldest? Passage 1:He travelled to England in 1989 to study at the University of Oxford, where he attended St Anne's College. While studying at Oxford, he made sixteen first-class appearances for Oxford University in 199091, scoring 607 runs at an average of 38.93. He made his only first-class century while playing for Oxford, scoring 101 not out against Lancashire in 1991. With his right-arm off break bowling, he took 19 wickets for Oxford with best figures of 3 for 32. He also made a single first-class appearance for the combined Oxford and Cambridge Universities cricket team against the touring New Zealanders in 1900, where he featured alongside fellow South African and St Anne's College attendee Willem van der Merwe. In addition to playing first-class cricket while at Oxford, he also appeared in three List A matches for the Combined Universities cricket team in the 1991 Benson & Hedges Cup. Returning to South Africa, he later made two first-class appearances for Transvaal in the 199393 Castle Cup.
Passage 2:Aside from the Romaniotes, a distinct Jewish population that historically lived in communities throughout Greece and neighboring areas with large Greek populations, Greece had a large population of Sephardi Jews, and is a historical center of Sephardic life; the city of Salonica or Thessaloniki, in Greek Macedonia, was called the "Mother of Israel". Greek Jews played an important role in the early development of Christianity, and became a source of education and commerce for the Byzantine Empire and throughout the period of Ottoman Greece, until suffering devastation in the Holocaust after Greece was conquered and occupied by the Axis powers despite efforts by Greeks to protect them. In the aftermath of the Holocaust, a large percentage of the surviving community emigrated to Israel or the United States.
Passage 3:Yakov Hanecki was born in Warsaw, then in the Russian Empire, the son of Stanislav von Furstenberg, a beer manufacturer of German descent, who had adopted Poland as his homeland. In 1896 he joined the Social Democracy of the Kingdom of Poland (SDKP - later the Social Democracy of the Kingdom of Poland and Lithuania (SDKPiL)) led by Rosa Luxemburg and her lover, Leo Jogiches. He moved to Germany in 1901 and studied in rapid succession at Berlin, Heidelberg, and Zurich universities. From 1902, he was a professional revolutionary, normally based in Cracow, under Austrian rule, organising the transport of illegal literature across the Russian border. In August 1903, as a member of the Main Administration of the SDKPiL, he was one of two Polish delegates to the Second Congress of the Russian Social Democratic Labour Party (RSDLP) in Brussels. The Congress later adjourned to London, under pressure from the Belgian police, and there the RSDLP split into its Bolshevik and Menshevik factions, but Hanecki and the other Polish delegate, Adolf Warski, did not make the journey to London, having failed to agree terms on which the RSDLP and SDKPiL could collaborate.

Output:
3