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.
Q: Question: For many years did the revolution last that was followed by the the Mongols declaring independence? Passage 1:Born in San Sebastián on 1 August 1929, Cavero attended Our Lady of Remembrance College, Madrid before commencing studies in law and economics at the University of Deusto. Cavero completed his legal studies at the Complutense University of Madrid, where he later taught. Cavero joined the in 1973, and left the group two years later. At that time, Cavero also ended his involvement with the Democratic Left. In 1975, Cavero became a founding member of the . After joining the Union of the Democratic Centre, Cavero was elected to his first term on the Congress of Deputies as a representative from Madrid. He was reelected in 1979, as a deputy from Baleares. While serving consecutive terms as a member of the Congress of Deputies, Cavero also held several cabinet positions. He contested the congressional elections in 1982 in Grenada, but did not win. He remained the general secretary of the UDC until the party's dissolution in 1983. Cavero then assumed leadership roles in the People's Democratic Party and returned to the Congress of Deputies, winning election from Madrid in 1986. Cavero switched party affiliation to the Democratic and Social Centre in 1989 and ran for reelection in Burgos. He lost that year's election, and became a member of the People's Party in 1991. Cavero was named to the Spanish Council of State in 1996, and served until his death on 25 December 2002, of a heart attack at Clínica de La Luz in Madrid. He was 73.
 Passage 2:The Bogd Khanate of Mongolia was the government of Mongolia (Outer Mongolia) between 1911 and 1919 and again from 1921 to 1924. By the spring of 1911, some prominent Mongolian nobles including Prince Tögs-Ochiryn Namnansüren persuaded the Jebstundamba Khutukhtu to convene a meeting of nobles and ecclesiastical officials to discuss independence from the Manchu-led Qing China. On November 30, 1911 the Mongols established the Temporary Government of Khalkha. On December 29, 1911 the Mongols declared their independence from the collapsing Qing Empire following the Xinhai Revolution. They installed as theocratic sovereign the 8th Bogd Gegeen, highest authority of Tibetan Buddhism in Mongolia, who took the title Bogd Khaan or "Holy Ruler". The Bogd Khaan was last khagan of Mongolia. This ushered in the period of "Theocratic Mongolia", also known as the Bogd Khanate.
 Passage 3:The Sicilian-American respect for San Giuseppe (St. Joseph) is reflected in the celebration of the Feast of St. Joseph, primarily in New Orleans and Buffalo, every March 19. Many families in those cities prepare a "St. Joseph's Day table", at which relatives or neighbors portray Jesus, Joseph and Mary and oversee the serving of meat-free Lenten meals to the poor of the community. The tables are the vestiges of a Sicilian legend which states that farmers prayed to St. Joseph, promising that if he interceded in a drought, they would share their bounty with the poor. The foods served at such tables include: pasta con sarde (spaghetti with sardines); lenticchie (lentils); and various froscie (omelettes) made with cardoon (wild artichoke), cicoria (dandelion) and other homely vegetables. Desserts include sfincie, zeppoli, a light puff pastry; pignolati (honey balls); and cannoli, a Sicilian creation. One tradition has each guest at a St. Joseph's Day table receiving a slice of orange, a bit of fennel and a fava bean, for good luck.

A:
2