Q: 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 long did it take Timur to take over Tbilisi? Passage 1:The cruiser Bayan (Russian: Баян) was the name ship of the four armoured cruisers built for the Imperial Russian Navy in the first decade of the 20th century. The ship had to be built in France because there was no available capacity in Russia. Bayan was assigned to the First Pacific Squadron after completion and based at Port Arthur from the end of 1903. She suffered minor damage during the Battle of Port Arthur at the beginning of the Russo-Japanese War of 1904–05 and supported destroyers as they patrolled outside the harbour. After bombarding Japanese positions in July 1904, the ship struck a mine and was out of action for the next several months. Bayan was sunk during the Siege of Port Arthur and was then salvaged by the Japanese after the war.
 Passage 2:Sonoma Raceway, formerly Sears Point Raceway and Infineon Raceway, is a road course and drag strip located on the landform known as Sears Point in the southern Sonoma Mountains in Sonoma, California, USA. The road course features 12 turns on a hilly course with of total elevation change. It is host to one of only two NASCAR Sprint Cup Series races each year that are run on road courses (the other being Watkins Glen International in Watkins Glen, New York), and one of six national series road course races (Xfinity Series racing at Watkins Glen, Mid-Ohio Sports Car Course and Road America; and the Camping World Truck Series at Canadian Tire Motorsport Park). It is also host to the Verizon IndyCar Series and several other auto races and motorcycle races such as the American Federation of Motorcyclists series. Sonoma Raceway continues to host amateur, or club racing events which may or may not be open to the general public. The largest such car club is the Sports Car Club of America.
 Passage 3:Timur's first appearance in the Caucasus was a response to Khan Tokhtamysh's marauding inroad into Northern Iran through the Caucasian lands in 1385. This marked an outbreak of outright hostility between the two Islamic monarchs. Timur responded by launching a full-scale invasion of the small frontier countries, which lay between the western border of his emerging empire and Tokhtamysh's khanate. After having overrun Azerbaijan and Kars, Timur marched into Georgia. The official history of his reign, Zafarnama, represents this campaign in Georgia as a jihad. Timur set out from Kars and assailed Samtskhe, the southernmost principality within the Kingdom of Georgia later in 1386. From there, he marched against Tbilisi which the Georgian king Bagrat V had fortified. The city fell on November 21, 1386, and King Bagrat V was captured and converted to Islam at sword point. The Georgian Chronicle and Thomas of Metsoph mention the apostasy of the king but represent it as a clever ruse which enabled him to earn a degree of trust of Timur. Bagrat was given some 12,000 troops to reestablish himself in Georgia whose government was run by Bagrat's son and co-ruler George VII during his father's absence at Timur's court. The old king, however, entered in secret negotiations with George who ambushed Bagrat's Islamic escort, and freed his father.

A:
3