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 many soldiers were there in the Russian Imperial Army? Passage 1:In 2015 Season, Romanova's first competition was at the 2015 L.A. Lights where she finished 5th in the all-around. At the 2015 Valentine Cup, she won bronze medals in the all around, hoop, ball and placed 4th in clubs and ribbon. In March 14–15, Romanova competed at the 2015 Baltic Hoop finishing 5th in all-around, she took silver in ball and bronze in hoop finals. In March 27–29, Romanova competed at the 2015 Lisboa World Cup finishing 11th in the all-around. In April 10–12, Romanova finished 16th in the all-around at the 2015 Pesaro World Cup. Romanova with teammates (Ganna Rizatdinova, Viktoria Mazur) competed at the 2015 European Championships where Team Ukraine won bronze. Romanova competed at the 2015 Holon Grand Prix finishing 12th in all-around and qualified to 1 event final. In June 15–21, Romanova competed at the inaugural 2015 European Games where she finished 16th in the all-around. In August, Romanova finished 18th in the all-around at the 2015 Sofia World Cup behind Varvara Filiou. In September 9–13, Romanova (together with teammates Ganna Rizatdinova and Viktoria Mazur) competed at the 2015 World Championships in Stuttgart, with Team Ukraine taking bronze. Romanova also dramatically qualifies to the individual all-around finals (0,008 points ahead of Viktoria Mazur), but misses it due to the foot injury (she was substituted by Viktoria Mazur).
 Passage 2:He returned to the factory in Kamianske during the Russian Revolution of 1905. He again joined the volunteer fire brigade. He returned to Vilnius in 1911 and organized a fire brigade in Šnipiškės in 1914. Semashko rallied the men into a militia to protect the city from hooligans and fires when the Russian Imperial Army abandoned the city during the Great Retreat in mid 1915. He became city's fire chief (brandmajor) and commanded both local and German Ober Ost firefighters during fire. At the same time, he turned away from Polish political activists towards Belarusian and Lithuanian causes. He was a contributor to the Belarusian newspaper Homan and was elected to the Rada of the Belarusian Democratic Republic in January 1918. He participated in the declaration of independence of the Belarusian People's Republic and drafted plans for establishing a Belarusian university, named after Adam Mickiewicz, in Minsk. On 23 April 1918, he participated in discussions with the Council of Lithuania regarding the territory of Lithuania and Belarus after the war and ideas on resurrecting the old Grand Duchy of Lithuania. 
 Passage 3:Tropical cyclone activity in each basin is under the authority of an RSMC. The National Hurricane Center (NHC) is responsible for tropical cyclones in the North Atlantic and East Pacific. The Central Pacific Hurricane Center (CPHC) is responsible for tropical cyclones in the Central Pacific. Both the NHC and CPHC are subdivisions of the National Weather Service. Activity in the West Pacific is monitored by the Japan Meteorological Agency (JMA). Systems in the North Indian Ocean are monitored by the Indian Meteorological Department (IMD). The Météo-France located in Réunion (MFR) monitors tropical activity in the South-West Indian Ocean. The Australian region is monitored by five TCWCs that are under the coordination of the Australian Bureau of Meteorology (BOM). Similarly, the South Pacific is monitored by both the Fiji Meteorological Service (FMS) and the Meteorological Service of New Zealand Limited. Other, unofficial agencies that provide additional guidance in tropical cyclone monitoring include the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) and the Joint Typhoon Warning Center (JTWC).

Output:
2