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: How long had the 21st Division existed before the 1st Wilts joined them? Passage 1:Upon mobilization and the declaration of war, the 1st Battalion, Wilts deployed to France as part of the 3rd Division's 7th Brigade, landing in France on 14 August 1914, and soon fought in the Battle of Mons and the Great Retreat and, in October, in the First Battle of Ypres, by which time the battalion had lost 26 officers and over 1,000 other ranks. The 1st Wilts remained on the Western Front with the 3rd Division until the 7th Brigade was transferred to the 25th Division on 18 October 1915. In March 1918 the battalion was involved in Operation Michael, the opening phase of the German Army's Spring Offensive, and subsequently reduced to company strength. It was during this fighting that Acting Captain Reginald Frederick Johnson Hayward MC was awarded the Victoria Cross. The 1st Wilts served with the 25th Division until was transferred on 21 June 1918. On 21 June 1918, the 1st Wilts joined the 110th Brigade, part of the 21st Division, with which it served for the rest of the war.
 Passage 2:Towering in the Bielsko-Biała city centre, the Castle is the oldest and largest construction of historical importance, erected in the old town of Bielsko. A legend says that in its place there used to be a settlement of robbers who attacked travelling merchants. The Opolski Prince, Casimir (1229/30) of the Piasts is said to have conquered that fortalice, wiped out the robbers and had the hunting palace erected in that place, which over the years grew into a magnificent castle around which the city of Bielsko developed. The oldest part of the Castle dates back to 14th century. Over the next centuries the Castle gradually developed and transformed. It is a city castle in its nature, incorporated into the system of Bielsko fortifications from the beginning, at the same time providing their strongest section. Over the centuries it performed the function of a Silesian border-stronghold, first guarding the borders of Cieszyn and Oświęcim district duchies and then in the second half of the 15th century it protected the Czech and Polish state border and from 1526 - the Austrian-Polish border. Starting from the close of the 16th century, its defensive role was declining and the Castle gradually transformed into a nobleman’s mansion. The present appearance of the castle dates back to the last, thorough reconstruction undertaken in the second half of the 19th century, which entirely wiped out its previous characteristics of style. During the years 1899-1973, in place of brick breast wall presently seen on the east part of the Castle, there used to be a parade of bazaars, constituting an attractive architectural foundation for the body of the Castle. The bazaars were pulled down in connection with widening of Zamkowa Street. The Castle erected by Piasts ruling over the Cieszyn Dutchy was one of their residences for over two centuries. From 1572 it was the administrative and commercial centre of the independent class-based Bielsko state, governed by representatives of nobleman’s families of the Promnitzes, Schaffgotsches, Sunneghs, Solmses and Haugwitzes. In 1752, the position of that state was raised to the position of duchies which went into the rule of the Sułkowskis family. The Bielsko Dutchy existed until 1849, when Austria introduced modern administrative division, thus doing away with old feudal structures and was incorporated into Bielsko District Starosty. The Castle itself and numerous estates in the vicinity of the city remained in the possession of the Sułkowskis until 1945. After World War II the Castle was taken over by the Polish State as the property left by the Germans and was facilitated as the seat of many cultural institutions. Since 1983 the Castle sole usufructary has been the national Museum in Bielsko-Biała, subordinated to Silesian local government in Katowice.
 Passage 3:Kriaučiūnas was born into a well-off Lithuanian family in Suvalkija. He attended Marijampolė Gymnasium and Sejny Priest Seminary. As a good student, he obtained a stipend from the Archbishop of Mogilev to study at the Saint Petersburg Roman Catholic Theological Academy. However, the stipend obligated him to work at the Archdiocese of Mogilev. Therefore, he declined the final ordination to priesthood and attended University of Warsaw for a year to get a teaching diploma. He then returned to Lithuania and became a teacher at the Marijampolė Gymnasium. He taught Latin, Lithuanian, German and Greek languages and encouraged his students, many of whom later became prominent figures in independent Lithuania, to be proud of their Lithuanian identity and heritage. He defied the Lithuanian press ban teaching his students Lithuanian in the Latin alphabet and not the government-imposed Cyrillic script. Kriaučiūnas actively supported Aušra and Varpas, the key Lithuanian-language periodicals. He was forced to resign from the gymnasium in 1887 and found employment with the Marijampolė Court. In 1889, he was assigned as justice of the peace to where he spent a decade. During his free time, he continued to study linguistics. While his contemporaries were impressed by his wealth of knowledge, he wrote very little. His home was frequently visited by various activists and scholars. He was particularly close with Vincas Kudirka. In 1899, he lost his government job and was forced to take up a private attorney practice in Marijampolė until he was able to regain his teaching position at the Marijampolė Gymnasium in 1906. He taught Latin and Lithuanian languages and law. During World War I, the gymnasium evacuated to Yaroslavl where he died in January 1916.

Output:
1