Given the task definition and input, reply with output. 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 old was Maina Gielgud when Bridgett Zehr became her apprentice? Passage 1:In 270 the Roman emperor Aurelian engaged the Sassanids, who had now replaced the Parthians, on the eastern front and he was able to drive them back. Tiridates, as the true heir to the now Persian-occupied Armenian throne, came to Armenia and quickly raised an army and drove the enemy out in 287. When Tiridates returned to Armenia, he made the city of Vagharshapat his capital, as it had been the capital of his late father. For a while, fortune appeared to favour Tiridates. He not only expelled his enemies, but he carried his arms into Assyria. At the time the Persian Empire was in a distracted state. The throne was disputed by the ambition of two contending brothers, Hormuz and Narses. The civil war was, however, soon terminated and Narses was universally acknowledged as King of Persia. Narses then directed his whole force against the foreign enemy. The contest then became too unequal. Tiridates once more took refuge with the Romans. The Roman-Armenian alliance grew stronger, especially while Diocletian ruled the empire. This can be attributed to the upbringing of Tiridates, the consistent Persian aggressions and the murder of his father by Anak. With Diocletian's help, Tiridates pushed the Persians out of Armenia. In 299, Diocletian left the Armenian state in a quasi-independent and protectorate status possibly to use it as a buffer in case of a Persian attack. Tiridates married an Alani Princess called Ashkhen in 297 by whom he had three children: a son called Khosrov III, a daughter called Salome and an unnamed daughter who married St. Husik I, one of the earlier Catholicoi of the Armenian Apostolic Church.
 Passage 2:Born in Sarasota, Florida, Zehr trained from the age of seven with the Sarasota Ballet School and later with the Harid Conservatory in Boca Raton. When she was 17, she joined the Houston Ballet as an apprentice, working with Maina Gielgud there and becoming a soloist in 2006. The National Ballet of Canada in Toronto took her on as a soloist in 2007, promoting her to principal dancer in 2009. In both Houston and Toronto, she established a close personal and professional relationship with Zdenek Konvalina. Following Konvalina, in 2011, she joined the English National Ballet as a principal dancer. She has danced principal roles in several classical ballets including The Sleeping Beauty, Swan Lake and Giselle and in works by George Balanchine such as Apollo (ballet) and Jewels. She received the Rolex Dancers First Award in 2009 for dancing the title role in Davide Bombana's Carmen.
 Passage 3:Characters based on ancient Egyptian deities were first mentioned in Captain America Comics #20 (November 1942), published by Marvel Comics' predecessor Timely Comics, in which Captain America and Bucky investigate the murder of Colonel Fitzpatrick, who was studying the Book of Thoth while stationed in Egypt. The Heliopolitans first full Golden Age appearance was in the story "The Terror That Creeps" by Stan Lee and Werner Roth, published in Marvel Tales #96 (June 1950), and involves a man that fails to convince the public that the Great Sphinx of Giza is slowly moving to the edge of the desert, where it will be empowered by Set and destroy mankind. The goddess Bast would later make her first appearance (as a totem) with the Black Panther in Fantastic Four #52 (July 1966). Many of the other deities, including Horus, Isis and Osiris, were introduced in Thor #239 (September 1975). Khonshu, who became associated with Moon Knight, first appeared in Moon Knight #1 (November 1980). Joseph Muszynski argued in his book Everything I Needed to Know About Life I Learned from Marvel Comics that the introduction of Egyptian deities "excited our tendency to enjoy variety" as the pantheon contained multiple gods and personalities as opposed to the Judeo-Christian religions. Ed Strauss contended that Marvel was able to dive into ancient Egyptian religion because it "had long been retired into the realm of mythology" unlike Christianity.
2