Definition: 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: Approximately how many people died in the massacares at the end of the Russian Revolution? Passage 1:For the rest of her long career, Ancona served in a variety of roles, both in the main fleet and in Italy's colonial empire. After the end of the war, the government lost confidence in the fleet and drastically reduced the naval budget. The cuts were so severe that the fleet had great difficulty in mobilizing its ironclad squadron to attack the port of Civitavecchia in September 1870, as part of the wars of Italian unification. Instead, the ships were laid up and the sailors conscripted to man them were sent home. Some time after 1866, the ship was rebuilt as a central battery ship, with most of her guns located in a central, armored casemate. Two other guns were placed in the bow as chase guns, with a third mounted as a stern chaser. At around 1871, her armament was also revised, to two guns in the bow and eight 8in guns, four on each broadside and the last in the stern. Later, her armament was changed again, to eight guns, six guns, four quick firing (QF) guns, and two Hotchkiss revolver cannons. Ancona was stricken from the naval register in 1903 and then broken up for scrap.
Passage 2:During the Russian Revolution of 1905, conflict erupted between the Armenians and the Azeris, culminating in the Armenian-Tatar massacres. In the final year of World War I, Nakhchivan was the scene of more bloodshed between Armenians and Azerbaijanis, who both laid claim to the area. By 1914, the Armenian population was at 40% while the Azeri population increased to roughly 60%. After the February Revolution, the region was under the authority of the Special Transcaucasian Committee of the Russian Provisional Government and subsequently of the short-lived Transcaucasian Democratic Federative Republic. When the TDFR was dissolved in May 1918, Nakhchivan, Nagorno-Karabakh, Zangezur (today the Armenian province of Syunik), and Qazakh were heavily contested between the newly formed and short-lived states of the First Republic of Armenia and the Azerbaijan Democratic Republic (ADR). In June 1918, the region came under Ottoman occupation. Under the terms of the Armistice of Mudros, the Ottomans agreed to pull their troops out of the Transcaucasus to make way for the forthcoming British military presence.
Passage 3:The 200304 season began with another 10 win over Uniao de Leiria, which gave the club its 13th Supertaca. Weeks later, Porto failed to repeat this result in the 2003 UEFA Super Cup, losing 10 to Milan. The departure of striker Helder Postiga was compensated by the signing of South Africa's Benni McCarthy, whose 20 league goals helped Porto in its league title defence and crowned him the competition's top scorer. Mourinho entered the 200304 UEFA Champions League with confidence to his team. Porto finished second in its group, losing only once to Real Madrid, and advanced to a round-of-16 meeting with Manchester United. Porto scored on the 90th minute of the second leg at Old Trafford to draw 11 and advance to the quarter-finals with a 32 aggregate win. The team then overcame Lyon and Deportivo La Coruna and reached the Champions League final, where it defeated Monaco 30 to lift the club's second European Champion Clubs' Cup. A 21 loss to Benfica in the Taca de Portugal final, held 10 days before, prevented another treble-winning season.

Output:
2