Given the task definition and input, reply with output. 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: Who did Nikolay Novosiltsev work for? Passage 1:In the 9th and 10th centuries, the Župa of Travunia was held by the Belojević noble family, who were entitled the rule during the reign of Prince Vlastimir (r. 830–850), of the Vlastimirović dynasty. After the death of Časlav, the last dynastic member, the principality disintegrated, and the provinces were annexed by the Bulgars and Byzantines. In 1034, Stefan Vojislav (the founder of the Vojislavljević dynasty) incited a rebellion and renounced Byzantine rule, becoming the Prince of Serbs, ruling from the seat at Duklja. In the early 12th century, Desa of the Vukanović dynasty wrestled the region, and it continued under the rule of the Nemanjić dynasty (1166–1371), either held by dynastic members or close associates (most often military commanders), of which was the notable Vojinović noble family. After Nikola Altomanović, the holder of a large province during the fall of the Serbian Empire, was defeated in 1373, his estates were divided between Prince Lazar Hrebeljanović of Serbia, Đurađ I Balšić of Zeta, and Ban Tvrtko I Kotromanić of Bosnia. Trebinje continued under the Bosnian crown in the hands of the Pavlović family, then in 1435, it became part of the Duchy of Saint Sava of the Kosača family, in Ottoman vassalage. It was finally annexed in 1482 by the Ottomans and organized into the Sanjak of Herzegovina.
 Passage 2:In 1817, while still a student, Mickiewicz, Tomasz Zan and other friends had created a secret organization, the Philomaths. The group focused on self-education but had ties to a more radical, clearly pro-Polish-independence student group, the Filaret Association. An investigation of secret student organizations by Nikolay Novosiltsev, begun in early 1823, led to the arrests of a number of students and ex-student activists including Mickiewicz, who was taken into custody and imprisoned at Vilnius' Basilian monastery in late 1823 or early 1824 (sources disagree as to the date). After investigation into his political activities, specifically his membership in the Philomaths, in 1824 Mickiewicz was banished to central Russia. Within a few hours of receiving the decree on 22 October 1824, he penned a poem into an album belonging to Salomea Bécu, the mother of Juliusz Słowacki. (In 1975 this poem was set to music in Polish and Russian by Soviet composer David Tukhmanov.) Mickiewicz crossed the border into Russia about 11 November 1824, arriving in Saint Petersburg later that month. He would spend most of the next five years in Saint Petersburg and Moscow, except for a notable 1824 to 1825 excursion to Odessa, then on to Crimea. That visit, from February to November 1825, inspired a notable collection of sonnets (some love sonnets, and a series known as Crimean Sonnets, published a year later).
 Passage 3:In the decline and fall of the Mughal supremacy and the rise of the Sikh power this district saw its most stirring scenes. Some of the Sikh Gurus have been closely associated with the district. Guru Nanak, born in 1469 in the Lahore district, married in 1485 with Sulkhani, daughter of Mool Chand, a Khatri of Pakhoke (Dera Baba Nanak) in the Batala Tehsil. There is still a wall known as Jhoolana Mahal which swings in Gurdaspur. The Sikh Guru Hargobind refounded Sri Hargobindpur which had been formerly known by the name of Rahila. Banda Singh Bahadur, the disciple of Guru Gobind Singh used this district as a base to raid the country up to Lahore, the emperor Bahadur Shah conducted an expedition against him in 1711 but with only temporary effect. Banda Bahadar fought his last battle with the Mughal at Gurdas Nangal in the district and was captured. The history of the district then degenerates into an account of their struggles with the rival Ramgarhia Misl and Kanhaiya Misls for supremacy in this part of the Doab, the power of the former was broken in 1808 and of the latter in 1811.
2